Kuroto Dan

Kuroto Dan (檀 黎斗) is the 30-year old second CEO of Genm Corp. He is also the true identity of Kamen Rider Genm (仮面ライダーゲンム), also colloquially known as the Black Ex-Aid (黒いエグゼイド). He was also the host of the Level 30 Charlie Bugster.

In a plot to revive himself following his death, Dan temporarily transformed into Kamen Rider Blade (仮面ライダーブレイド), having assumed the form of Kazuma Kenzaki.

He is then revived again as a Bugster, due to the help of Poppy equipping him with the Proto Mighty Action X Origin Gashat and his prototype Gamer Driver, calling himself New Kuroto Dan (新檀 黎斗).

After helping co-develop the Doctor Mighty XX Gashat with Kiriya Kujo, and witnessing the power of the vaccine, he now refers himself as God Kuroto Dan (檀 黎斗 神).

After a fight in the rain against Kamen Rider Lazer, Kuroto is defeated and regains his sanity, now referring to himself again as just Kuroto Dan.

In Kamen Rider Zi-O, he was transformed into an Another Rider (アナザーライダー) Another OOO (アナザーOOO) derived from Kamen Rider OOO Tatoba Combo. He now refers himself as King Kuroto Dan (檀 黎斗 王).

As a Teenager
When he was 14 years old, Kuroto was a developer for his father's company, Genm Corp. Kuroto was extremely talented, due to the fact that many of his games were both bestsellers and masterpieces. During the Y2K problem, he discovered a computer virus, which would be later known as the Bugsters. One day, he received fan mail from Emu Hojo, suggesting ideas for a new game. Impressed, yet angered, Kuroto could not believe that someone else would be as talented as him. Thus, in revenge, he created a game known as Mighty Action C, and sent it to Emu. Emu would play it and be infected with the Bugster Virus, spawning Parado in the process.

Sometime afterwards, Kuroto had unintentionally infected his mother with the Bugster Virus. Desperate to find a way to save her, he enacted Zero Day, and eventually came up with the idea and purpose of the ultimate game: Kamen Rider Chronicle.

Beginning of Zero Day
Kuroto had been observing Emu from the shadows for a decade, in order to observe the development of the Bugster virus within the latter. In 2010, after Emu won the Tekken tournament against Nico Saiba, he would soon be abducted by the Next Genome Institute, whom Kuroto had hired to remove the now-mature Bugster virus from Emu's body. Shortly after the operation, the matured Bugster (later became known as Parado) was separated from Emu, while the members of the Next Genome Institute vanished. Kuroto would later use the virus harvested from Emu as the basis to trigger Zero Day.

As CEO of Genm Corp.
Kuroto has been CEO of Genm Corp. for at least five years. He was present during the beginning of Zero Day, when the Bugsters emerged from the glitches in ten of the games his company was developing on his desktop. While collaborating with the Ministry of Health, Kuroto helped design the Proto Gashats and Gamer Driver as a countermeasure to the Bugsters, all while managing to keep his agenda for unleashing the first Zero Day hidden from the public eye, by framing his father for this.

During Zero Day, Kuroto assigned Taiga Hanaya, who was a radiologist from CR at the time, to become the first Gamer Rider, giving him the Proto Bang Bang Shooting Gashat and also Protosnipe's Gamer Driver. In reality, he was using Taiga as a test subject on finalizing the Proto Gashat's finalized counterpart. However, upon Protosnipe's defeat to Graphite due to the Proto Gashat's side effects, Taiga left CR, and left his Gashat and Gamer Driver as well, while Hiiro Kagami becomes Kamen Rider Brave after the death of his girlfriend Saki Momose, who was Graphite's host. During this time, many other casualties were also infected, including Heiji Uesugi's son, leading Heiji to investigate Zero Day for years. Two years later, Kuroto was confronted by Kiriya Kujo, a coroner who had found out about Zero Day after his friend Jungo died in an accident, before the virus in him manifested to the real world. Kiriya was given a Gamer Driver and the Bakusou Bike Gashat, in exchange for his silence.

Second Bugster Outbreak
"I'm terribly sorry for the long wait, everyone. It has taken over five years of development from the initial announcement. But at last, that legendary game, Mighty Action X, is complete!"

- Kuroto announcing the release of his game. Five years after Zero Day, Genm Corp. had finally completed one of the ten games, Mighty Action X. At the press release, the Salty Bugster emerged from Sota Suyama. The Bugster was defeated by Kamen Rider Ex-Aid.

Following Ex-Aid's debut, Kuroto called Poppy Pipopapo and ordered her to record Emu's specs as Ex-Aid, using his specialized VR for later use. .

Becoming Genm
Soon after the incident, Kuroto met with Kyotaro Hinata. Hinata thanked Kuroto for providing the Driver and Gashats. Kuroto responded humbly, before asking how the incident was covered up. Sometime later, Kuroto took up the mantle of Genm to interrupt Ex-Aid and Brave's fight against Aranbura. He attacked the two Riders, allowing the Bugster to escape. After the incident, he was approached by Taiga Hanaya, who had been Protosnipe during Zero Day. After receiving large piles of cash, Kuroto gave Taiga a new Driver, along with the Bang Bang Shooting Gashat.

Working with CR
Kuroto was confronted by Hiiro Kagami, soon after CR learned that Taiga was a Rider again. Kuroto acknowledged the incident that cost Taiga his medical license, but defended his decision, saying that Taiga was both compatible and capable.

Kuroto later visited CR, only to be intercepted by Taiga, who demanded that he give him a simulation by using the VR simulator. Kuroto had intended to record Emu's specs again, but Taiga had confiscated Emu's Gashat beforehand. Disappointed, he prepared to leave, only to be threatened by Taiga to expose the Proto Gashats responsible for the Zero Day incident to the public. Leaving him with no choice, Kuroto finally simulated Taiga as the Shooting Gamer, but only once. After the simulation ends, Taiga asked him to give the data later and to relay his rematch acceptance challenge to Emu before he left, leaving the CEO speechless.

Kuroto came to CR later to apologize, claiming that he underestimated Taiga and didn't predict the latter would take Emu's Gashat. He assured Hiiro that there would be more Gashats ready within a few days. He interrupted Brave and Snipe's fight as Genm, depleting their Rider Gauges by a few units. After Ex-Aid and Lazer defeated the Motors Bugster, Genm finished the Bugster off to prevent Lazer from getting a sample to study. Using the Shakariki Sports Gashat, he became Sports Action Gamer Level 3, taking out Ex-Aid and Lazer with one hit.

Visiting CR again, Kuroto was met by Hiiro, who had been waiting for him in front of CR's lift. Hiiro demanded him to simulate him, because he could not accept his defeat to Genm. As Hiiro asked what Gashat did Genm use, Kuroto revealed that Genm uses the Proto Mighty Action X Gashat, which basically had the same ability perimeters as Ex-Aid. Hearing this, Hiiro became flustered and demanded the CEO to simulate him right now. After thinking about it, he finally agreed to simulate Hiiro. At the Quest Gamer simulation, Kuroto changed the enemy to Genm and sets the difficulties to Easy (presumably to hinder him for leaking Genm's true power to Hiiro). After the simulation concluded, Kuroto decided to refuse recording Hiiro's data for his own good, before he left.

Fighting the Gamma


"What was that?" "Could it be... a Kamen Rider?"

- Deep Specter and Necrom on Genm

Without speaking a word, Genm arrives, already transformed into Action Gamer Level 2, as Deep Specter and Necrom are fighting a group of Gamma Commandos and Superiors, during the final battle between Ghost and the Great Eyezer. Believing the Gamma to be a hindrance to his plans, he joins in the fighting and helps the two Ghost Riders, summoning the Sports Gamer with the Shakariki Sports Gashat, before performing a Critical Strike to clear away the Gamma, immediately riding away.

Pursuing Ayumu
"What... they had the same form!?"

- Onari on Genm and Ex-Aid For unknown reasons, he stands holding the Shakariki Sports Gashat, while looking upon the city during a lightning storm. Later, he triggers the Gashat and a purple Game Area expands from his body, but the Area and the Gashat are pulled into a Gamma Hole, resembling a Great Eye interface. When Ayumu steps out holding the Gashat, Genm attempts to take it back, but is interrupted by Makoto and Alain, recognizing him from earlier. He fights Specter and Necrom using the Gashacon Bugvisor, disappearing when they counter with the Gan Gun Hand and Catcher.

The sketch Ayumu drew of Genm later leads Ghost to mistakenly attack the near-identical Ex-Aid, when the Rider tries saving Ayumu from a group of Bugster Viruses and retrieve the Shakiriki Sports Gashat, but a sudden attack by Genm shows Ghost his mistake. The attack knocked away the Gashat, which the dark Rider takes back, before fading into thin air.

Genm's True Identity
"You're like a crystal. You show the patient's heart within you...gently showering it in radiance. However, you can't help caring for other people. Not all patients are good people. If you ever get an evil patient...who tramples on your feelings...then it's possible your crystal will lose its brilliance, smashed beyond recognition."

- Kuroto giving Emu a warning. Kuroto calls Poppy Pipopapo, and informs her that the newly-developed Level 3 Gashats have all stolen by a hooded man. The CEO also secretly informs Taiga and Kiriya, giving them the special stethoscope. As Genm, he is later seen on the location of Robots Collabos, already transformed as Action Gamer Level 2, before changing into Sports Action Gamer Level 3. Thanks to his interference, Robots Collabos is able to flee. He himself also successfully vanished. Kuroto is later seen in CR and gives a proper welcome to Emu. He asks Emu if he knows who Genm really is, and Asuna claims that the thief is Genm. After witnessing Emu quarreling with Hiiro, Kuroto gives chase to Emu, who fled to a helipad. There, Kuroto tried to comfort Emu by saying that it's only natural for a doctor to desire to save a patient. However, he agreed with Hiiro, since the man is responsible for the stolen Gashat. He then compares Emu to a crystal, that once shattered by a malicious patient, it won't able to shine ever again. However, Emu still persisted with his idealism and left, stating that he'll regret the day he can't save a patient, much to the CEO's astonishment.

Deciding to teach Emu a lesson, Kuroto transformed into Genm Sports Action Gamer Level 3 and with Robots Collabos, they were able to beat Brave Quest Gamer Level 2 and Lazer Bike Gamer Level 1. The thief soon joins in, as Emu asked Genm why he attacked the doctors, but he states that he might refer to the thief. The thief later turns out to be Graphite, and this enrages Snipe as they collide with each other, though this ended in Snipe's defeat.

Genm soon provokes Emu that his idealism didn't work on a real battlefield, and in battle, it's survival for the fittest. Due to these words, Emu snapped and transformed into Ex-Aid Action Gamer Level 2. Ex-Aid successfully beat Robots Collabos using Mighty Critical Finish and claims the Gekitotsu Robots Gashat in the process. Ex-Aid then changed into Robot Action Gamer Level 3 and successfully beat Genm using Gekitotsu Critical Strike. Genm then retreats, while Ex-Aid roars in rage.

"As if! What's terrifying...is my own talent!"

- Dan shows his unhinged nature to Graphite and Parado.

As Genm staggers, he reverts to Action Gamer Level 2. Kuroto finally cancels his transformation and covers his face. As Graphite asked if he was afraid of Emu, the CEO then shows a psychotic smile, as he said that his genius is the one and only thing he feared. Parado then christened Kuroto as Kamen Rider Genm, as the latter showed an evil grin.

While Kiriya was recovering from his injuries late at night in the hospital, Kuroto forced him to use the VR and simulate him as the Bike Gamer while he was unconscious. He then ordered Kiriya to transform in order to collect his data, and stated that the simulation was a game he created, which allowed no escape from him. However, Kiriya believed he was lying, but had no choice but to listen to the former's commands. For unknown reasons, Kuroto controlled Kiriya's movements to transform into Bike Gamer Level 1 and Bike Gamer Level 2, all while threatening that he will let him pay the price of knowing his identity. After that, he took the Bakusou Bike Gashat out of Kiriya's Gamer Driver and inserted it into the Kimewaza Slot Holder, thus starting the finisher. However, during this time, he did not sit onto Lazer, causing Lazer to accelerate uncontrollably on his own and crashing into a wall, ending the simulation. Before he left, he threatened Kiriya to stay away from him, this threat caused him to tremble in fear.

Phase 1 of the Ultimate Game
As the Beat Collabos Bugster is fighting Ex-Aid and Brave, Graphite enters to try and defeat the Riders. Kuroto, who is watching from afar, chooses to transform into Genm for the first time onscreen, and tells Graphite to retreat with the Bugster. Graphite begrudgingly does, after which the Rider himself proceeds to leave.

As Emu and Hiiro extract the Collabos Bugsters from Yoshio Okada, Genm intervenes and fights off both Emu and Hiiro as Sports Gamer Level 3, allowing the Bugsters to escape. When Hiiro later tries fighting the Chambara Collabos Bugster, Genm steps in again and fights Brave Quest Gamer Level 2, which gives Emu and Kiriya enough time to obtain the Giri Giri Chambara Gashat. Genm then fights Kiriya as the now Chambara Bike Gamer Level 3, after having his identity exposed. After some fighting, Kuroto is defeated by Lazer's Giri Giri Critical Finish, but Parado appears and creates a protective barrier to allow the dark Rider to escape and fool Emu and Hiiro by pretending to have been the "Black Ex-Aid". When Parado later returns to give Kuroto back his Gamer Driver and Proto Mighty Action X Gashat, the CEO concludes that no one will ever believe Kiriya now.

While alone in his office, Kuroto decided to use the VR on himself late at night, starting the simulation by plugging his Proto Mighty Action X Gashat in the VR device. During the simulation, he was surprised to find out Graphite was there as well. Questioning Graphite as to him almost spoiling his identity as Genm, the proud Bugster replied that no one cared about that. This caused a vexed reaction in Kuroto, as he held up his Gamer Driver and Gashat, much to Graphite's confusion. The former then transforms into Kamen Rider Genm Action Gamer Level 1 to Level 2 before pulling out his Gashat, plugging it into his Kimewaza Slot Holder and pressing the switch, ready to activate his Critical Strike. Graphite asked him if he is serious about this, to which Kuroto replied that one thing: he definitely was. He pressed the switch again, and activates his finisher, which defeated Graphite. As the simulation concluded, Kurto returned to his office where he pulled the Gashat out of the simulation device. Laughing madly, the deranged CEO boasted that no one would interfere in his way, claiming that he would create the ultimate game, as he held the Proto Mighty Action X Gashat in front of the Mighty Action X poster. While sitting in his office, Parado warns Dan that while the Proto Gashats have great potential, prolonged use will damage his body. A moment later, Dan receives a call from Kiriya Kujo. The next day, Dan confronts Kiriya under a bridge, denying he knows anything about Parado before the two proceed to fight as Genm Sports Action Gamer Level 3 and Lazer Chambara Bike Gamer Level 3 respectively. The two are evenly matched and even after colliding with their respective Critical Finishers, do not revert to human form. When Kiriya questions why Dan helps the Bugster, Dan says that he does it to figure out why the Bugsters came into their world and developed the Gamer Drivers and Rider Gashats to help doing so. Dan then brings up the fact that to use the Gamer Drivers, one had to undergo a compatibility surgery, and like Kiriya, had done so to become a Kamen Rider. When Kiriya questioned why Dan is mentioning this now, Dan proceeds to hint to Kiriya that one of the Kamen Riders has not received the compatibility surgery, which Kiriya quickly identifies as Emu Hojo.

Back at his office, Dan confirmed to Parado that he had allowed Graphite to take the Proto Drago Knight Hunter Z so that he would give the Kamen Riders their most challenging fight yet as he went on a rampage, causing Parado to enthusiastically voice to Dan that he scared him. Taking out the refined Drago Knight Hunter Z itself, Dan, noting that acquiring its combat data would complete the first stage, set off to deliver it to CR. Passing Taiga, who had trespassed on his premises, Dan told him that he would unfortunately not be giving this tenth Gashat to him. Arriving at CR, Dan presented Drago Knight Hunter Z, a unique albeit incomplete Level 5 Gashat, to Emu and Hiiro as the key to defeating Graphite. Dan revealed, however, that Drago Knight Hunter Z would need to be completed by defeating the Hunter Gamer, which Ex-Aid and Brave encountered as a Bugster Union within Kyotaro Hinata. Despite Dan's warning that, as a co-op 4 Player game, Drago Knight Hunter Z would need teamwork to avoid the danger of using it alone, Emu took the Gashat for himself, vowing to clear the game.

Dan later watched with Parado from a distance as Emu initially failed to acquire the co-operation of his fellow Riders, assuring him that they would collect their data eitherway and that they could eventually replace the troublesome doctors with new candidates. Nevertheless, Emu ultimately achieved a collaboration resulting in the four Riders dividing and using the Hunter Gamer together to terminate Graphite, with the Proto Drago Knight Hunter Z being salvaged by Parado. With this, Dan was able to complete tests and data recording, allowing him to proceed to the next stage.

Ganbarizing Project
Following the Dr. Pac-Man incident, Dan assembled a collection of specially created Heisei Rider Gashats. Energizing the last three of the first sixteen with his Ganbarizing machine, Dan requested that Emu return the Kaigan Ghost Gashat that he had used back to him only to arrange for him to be ambushed by a Collabos Bugster which utilized the Proto Gashats recovered from the Next Genome Institute. Coming to Ex-Aid's "aid" with a briefcase holding these Rider Gashats in hand, Dan provided him with the Full Throttle Drive which allowed him to disarm the Bugster of Proto Gekitotsu Robots. Dan was grazed by the Bugster when it changed to Proto Giri Giri Chambara, appropriately handing the Toukenden Gaim to Ex-Aid as Asuna took him to safety.

Easily managing to lose Asuna, Dan proceeded to enter the last phase of data collection on these Gashats himself as he transformed into Kamen Rider Genm, using Magic The Wizard to assume Wizard Gamer Level 2. Appearing before Ex-Aid who has just disabled the Bugster, Genm easily overwhelmed the Gaim Gamer before forcing him out of his transformation with Wizard's Critical Strike. Reverting to his default Action Gamer Level 2, Genm recovered the three Rider Gashats that Ex-Aid had just used. Announcing that he had collected all the data he needed, Genm used the power of the Legend Rider Gashats to complete his Ganbarizing Gashat. Using the blank Collabos Bugster as a conduit to harness the power of Kamen Rider Battle: Ganbarizing, a game Emu was unfamiliar with, Genm brought forth manifestations of Kamen Riders Double, OOO and Fourze. Advancing on Emu, the three Riders were held off by the sudden appearance of Dr. Pac-Man, coming as a shock to both Emu and Genm as he presented his own three Bandai Namco Gashats.

While "Dr. Pac-Man" escaped with Emu, Genm and his Riders soon enough caught up with the pair as they were joined by Hiiro and Taiga. With "Dr. Pac-Man" taking his leave after providing the three doctors with his Gashats, allowing them to face Genm's Riders, Genm pursued this "Dr. Pac-Man", ultimately catching up with him before taking off his helmet, with Genm realizing his true identity as he was faced with a fourth Gashat, Taiko no Tatsujin.

Genm's Identity Revelation
After revealing himself to the other Riders, Dan revealed that there was a large amount of people infected with the Bugster virus, pointing out that no-one knows when a break-out might happen. He then challenges the other Riders to save those people with the ten Gashats, saying that it was up to them whether they will be saved or not before shooting at them with the Gashacon Bugvisor to make his escape. Upon escaping, Dan examined the new Gashat he had created: Dangerous Zombie.

Killing Lazer


"I am...Kamen Rider Genm...Level 10."

- Genm's introduction when he first transformed into Zombie Gamer Level X.

"I'll bury you and the truth in the darkness."

- Genm before killing Lazer

Soon after this incident, Dan learned that Kiriya had interrogated his father and was planning to inform the other Riders of his findings. Dan found Kiriya before the others arrived to confirm the latter's findings. Deciding that Kiriya knew too much, Dan tricked him into taking the Dangerous Zombie Gashat, pretending to offer it in exchange for Kiriya's silence. Once Lazer was weakened within inches of his life after trying to use Dangerous Zombie, Dan took the Gashat back and used it to become Genm Zombie Gamer Level X. With the massive advantage, Genm stole the Giri Giri Chanbara Gashat and mortally wounded Lazer, seconds before CR and Snipe arrived.

Fight Against Ex-Aid Double Action Gamer
Deciding that the "test players" were no longer needed, Dan moved to recover all the Gashats from the doctor Kamen Riders. As the Zombie Gamer, Dan first confronted Ex-Aid and Brave was they were facing the Level 3 Aranbura Bugster. It was there that Genm first summoned the Gashacon Sparrow, with the sight of him using Kiriya's weapon enraging Ex-Aid into assuming Hunter Action Gamer Level 5 Full Dragon. Though struck by Ex-Aid's full power, engulfed in a massive explosion, Genm recovered in a cloud of purple smoke. As Ex-Aid realized that Genm's Rider Gauge was stuck at zero, Dan announced he had surpassed death and all attacks are useless against him. Nevertheless Ex-Aid kept on attacking Genm, ignoring Brave's fight with the Bugster. Triggering the Critical Dead, sending forth a horde of shadowy zombie figures, Genm nearly eliminate Ex-Aid but Brave tackled him out of the way just as the zombies exploded, with Hiiro undoing both of their transformations to remove the Game Area and escape.

At his hideout, Dan decided that he would only return to Genm Corp. after he completed Kamen Rider Chronicle, a game which soon people "would not be able to live without". He had also created a new blank, double Gashat for Parado's use, instructing him that it would need to be inserted into a Bugster to get the data to finish it, whereas humans using it would get a massive Bugster virus infection, dying instantly. Joining with Aranbura, Genm easily defeated both Snipe and Brave. Ready to kill the doctors, Genm was confronted by Emu who, to his surprise, was holding the blank double Gashat he had given to Parado. As expected, Emu used the Gashat which caused him to be overwhelmed by the Bugster virus. However, rather than sucuumb to the Game Disease, Emu unexpectedly changed and transformed the blank Gashat into a new game, Mighty Brothers XX, much to Genm's shock and Parado's intrigue. First transforming into the Level 1-esqe Double Action Gamer Level X, this new Ex-Aid proved to be a match for Genm as he attacked him before advancing up to Level XX, which had the effect of splitting him into two seperate Level 2-shaped Riders. However, while Emu had became a force to be reckoned with, this split also caused him to seemingly become two distinct, conflicting individuals, with Genm using the distraction to escape with the Bugster. That night, Dan discussed Emu's survival and use of the new Gashat with Parado. Branding it a bootleg, Dan vowed to erase the data of Emu's game while creating another Gashat for Parado.

Confronting Ex-Aid, back as the Level 2 Action Gamer, Genm easily defeated the familiar Emu, asserting his place as the Game Master and demanding the new game be deleted. Emu, however dismissed his talk of games as he was operating on a patient; transforming again into Ex-Aid Double Action Gamer Level X then Level XX. Vowing for a perfect co-op this time, the two Ex-Aids fought Genm and Aranbura. Ultimately, the Double Action Gamer succeeded in destroying Aranbura, who was then salvaged by the Gashacon Bugvisor used by Genm, who told Ex-Aid that fate was out of his control before leaving.

Developing Kamen Rider Chronicle
As Revol re-emerged as a Level 5 from Nico Saiba, Dan confronted Emu again, intent on deleting the data of Mighty Brothers XX as he assumed the Zombie Gamer. Evenly matched with Ex-Aid's divided Double Action Gamer, Genm cut the battle short and escaped with Revol. Dan was confronted by Taiga with the information that Kiriya had presumably discovered and was silenced for: Emu had the Game Disease. Kuroto casually expounded: Emu was the first person ever to have the Bugster virus, being given it six years ago in an experiment by Dr. Michihiko Zaizen of the Next Genome Institute, intended to create a Bugster being. However, the virus had spread and killed everyone involved save Emu, and he was returned to his normal life without remembering the incident. Kuroto then clarified that he only killed Kiriya because his intention had been to use this information to destroy the Bugsters before leaving. Back at his hideout, Dan determined via recorded battle data that each side of Ex-Aid's Level XX (20) form had the power of Level X (10). Deciding that taking down the Double Action Gamer personally was beneath him, Dan, having created a new Gashat for Parado, gave it to him so he would be occupied having fun, which he would do so by easily defeating all three doctor Riders in his first battle.

When Parado returned to his hideout, Dan chided him for not bringing Emu's Gashats with him only for to Parado respond that he was only helping Kuroto so he could play Kamen Rider Chronicle; Dan conceded and agreed to let Parado defeat Ex-Aid his own way. While Revol returned, Dan assumed the Zombie Gamer to confront Ex-Aid and Brave, intending to take their Gashats himself. Initiating a Critical Dead before the two Riders could Level Up, Genm knocked them both out of their transformations. Though he was able to recover the Taddle Quest and DoReMiFa Beat Gashats from Hiiro, Dan was unable to acquire those from Emu as he was repeled by a surge of the Game Disease from within the intern. Parado showed up to tell Genm to get back in line by not attacking Ex-Aid before they both took their leave. Dan would later come back to take Snipe's Gashats while Parado fought Ex-Aid. Quickly shoving Nico aside when she attacked him with a mop, Genm successfully endured a Drago Knight Critical Strike from Snipe, recovering without a scratch. To the objection of Genm, Para-DX, having been attacked by Revol, who had moved to protect Ex-Aid as the object of Nico's stress, destroyed the Bugster who was promptly preserved by a frustrated Genm before taking his leave with Para-DX.

Murdering Burgermon
While using the data of Taddle Quest in the creation of a new Gashat, Dan was informed by Parado of an anomalous Bugster who had came from Ju Ju Burger, a game previously dropped from the Genm Corp.'s line-up which was developed by Tsukuru Koboshi in Dan's absence. Initiating a Stage Select, Dan would confront Emu and this Burgermon Bugster with Parado. While Para-DX recovered the Ju Ju Burger Gashat from the Riders, Dan assumed the Zombie Gamer and proceeded to terminate the Bugster, triggering a Critical Dead against both Tsukuru and Burgermon. Stepping into save his creator, Burgermon ran into the attack to stop the zombie horde from progressing, taking the full explosion and being destroyed, with Dan forgoing the preservation procedure reserved for his own Bugsters. In a rage, Emu raged at Genm as his eyes briefly glowed red before collapsing; Genm asked Emu if something within him was making him favor Bugsters before he and Para-DX took their leave. Back at his hideout, Dan, questioned by Parado as to his elimination of the anomalous Bugster being his only objective, cited his role as the "Game Master" and claimed Ju Ju Burger as his own but not the Bugster within, stating that all Gashats would help create the world of Kamen Rider Chronicle.

The Truth Behind Emu's Game Disease


"Emu Hojo!!! How are you able to transform into Ex-Aid...without undergoing the compatibility surgery? How are you able to create Gashats?! Why does your head hurt after transforming?! There is only one answer. Emu Hojo! You are Patient Zero...the very first person in the world...to be infected by the Bugster virus!"

- Kuroto Dan exposing the reason behind Emu's bizarre condition

Dan's next move was to take Snipe's Gashats. Infecting Tsukuru with Motors, he easily lured out Emu and Taiga to fight. The battle was evenly matched until Genm triggered an outbreak, causing Ex-Aid to chase after the upgraded Motors. With the main threat gone, Genm defeated Snipe and took back the three Gashats, gloating to Taiga that it would be child's play to create a new Gashat and beat Ex-Aid. Upon creating a new Level 50 Gashat from the games he stole, Dan began to revel in his victory. Parado's insistence to beat Emu himself only caused Dan's psychosis to worsen, prompting a narcissistic rant in which he declared himself to be God, claiming Gashats as something only he could create and that Bugsters were nothing but pawns in his master plan.

When Ex-Aid came to stop Motor's rampage, Dan was ready and waiting to unveil his new creation: Gashat Gear Dual β. Using the Fantasy Gamer from the Taddle Fantasy side, Dan took out Ex-Aid with one hit. Genm disposed of the now-useless Motors before demanding Emu's Gashats, threatening to kill him if he refused. Much to his shock, Genm was stopped by Para-DX, who had grown tired of the "Game Master's" arrogance and disregard for the Bugsters. Enraged by this defiance, Genm foolishly denounced Parado as a worthless game character, sending the latter into a fit of rage and earning the Game Master a brutal and humiliating defeat. In order to punish Parado for his insubordination, Dan attempted to rob the former of his wish to fight Emu by revealing Emu's status as patient zero of the Bugster virus, laughing madly at the sight of Emu's subsequent outbreak.

Dan's victory was short-lived: rather than disappearing, Emu merely fainted, and the Bugster remained in his body. Retreating to his base and seething at the unexpected failure, Dan waited for the next outbreak before confronting Ex-Aid again. Despite the overwhelming advantage, Genm was stopped by Hiiro's unexpected interference, losing three Gashats, including the Gashat Gear Dual β.

The Enigmatic Level and Death
"You don't understand anything...Neither the reason why I obtained death data from myself...nor why I chose Dangerous Zombie for my power. While this Gashat is Level 10...it is also Level X. That means...it's an unknown number."

- Genm explains why he chose Dangerous Zombie in the first place and the true meaning of Level X to Parado. Kuroto meets with Parado yet again after their fallout in his secret office, showing hostility. But Parado then leaves, excited to fight Brave Fantasy Gamer Level 50. Kuroto, later on, stage selects with Vernier, Emu, and Poppy in a deserted valley. Claiming Emu's fear of transforming no longer a threat, he transforms and proceeds to kill them both. But Taiga suddenly appears, with the Gashat he "took" from Hiiro at the abandoned hospital. As Snipe Simulation Gamer Level 50 takes on the current Bugster, Emu finds resolve in his responsibility for his patients and his body and uses the Mighty Brothers XX Gashat. Kuroto escapes yet again while absorbing the death data from Vernier, after being defeated. As Kuroto, very exhausted now, hides back and sees Parado, waiting there for him to finish Kamen Rider Chronicle. But Kuroto dismisses that and proceeds to tell him that the reason that he chose Dangerous Zombie as his power is because it's not only Level 10 but also Level X, the undetermined variable.

As Genm, he watches over Brave and Ex-Aid fight the Kaiden Bugster and then proceeds to battle against Snipe Level 50. He leaves in defeat and warns the doctors not to be involved in things that don't concern them. In his office, Kuroto reveals that he needs one more piece of death data from a Bugster to access Level X. Kuroto confronts with Emu and Asuna, after their discussion with Masamune Dan, who had confessed on his son's involvement with the Bugster Virus 16 years ago. Kuroto maniacally laughs, saying that he couldn't be arrested just yet and said he blamed his father for it. When the two find out that Uesugi's Bugster is out again, Kuroto leaps before Emu and the two transform and engage. While Taiga focuses on Parado, and Hiiro on Kaiden, Emu is left to fight Genm alone. Hiiro manges to finish off the Bugster with the Drago Knight Hunter Z Gashat just as Genm is defeated. After, Kuroto manages to absorb the death data, which bewilders the Riders. Kuroto rants on how Kamen Riders and Bugsters are small parts to "the ultimate game". He reveals his future plans on Kamen Rider Chronicle, in which civilians are allowed to transform into Kamen Riders and fight monsters in the real world, and that they must fight for survival or perish. Emu is enraged when hearing this, due to Kuroto's twisted sense of what a game is and how so many people have died, like Kiriya, Saki, and Uesugi's son because of him. Kuroto retorts Emu's efforts to stop him, now that he has acquired both immortality and the power of Level X and transforms, unleashing a massive shockwave. Emu uses his Mighty Brothers XX Gashat and the Gashacon Key Slasher to finish off Genm again, but the latter disappears.

1="Since 16 years ago...you've been so transparent and pure! The brilliance radiated by that crystal...electrified my talents! You're the best guinea pig! Your entire life...has been manipulated by my hands!"

- Kuroto reveals that he had been using Emu all along.

2="I'll show you the power of Genm X!"

- Kuroto unlocking the full potential of Level X.

Kuroto was seen in his hidden office and checking that only 3 Bugsters (Doremifa Beat, Shakariki Sports and Drago Knight Hunter Z) left to complete Kamen Rider Chronicle. However, the Ministry of Health had already known about Kuroto's hideout and sends a team of officials to arrest him and put a stop to his plans. However, when the leader of the group attempts to catch him, Kuroto shows signs of Game Disease and transforms into the Charlie Bugster, before rampaging. Charlie is then temporarily stopped by Emu using Mighty Brothers XX along with the Sports Gamer. As Kuroto is about to be dragged away, Emu decides to cure his Game Disease, with Hiiro backing him for safety purposes. Both doctors agreeing that not only would it be dangerous to the Ministry and civilians alike if the Bugster broke out again, but also because Kuroto needed to be alive to pay for his crimes. Kuroto cries and thanks Emu before he's dragged to CR. At CR, Kuroto explained about Zero Day and how he was the one who infected Emu 16 years ago. Out of pity, Emu decides to excise Charlie from Kuroto if he is to pay for his previous crimes. Emu then finishes Charlie off using Mighty Brothers XX, but Kuroto absorbs Charlie's debris using the Gashacon Bugvisor. Kuroto then tells Emu that he actually tricked Emu to cure him and that he infected himself with the Bugster Virus not only to escape from the ministry, but also to acquire the Bugster data needed to complete Kamen Rider Chronicle.

Kuroto then transforms into Genm Zombie Gamer Level X and quickly defeats Emu using his refined Critical Dead, corrupting Emu's Gamer Driver in the process. Kuroto boasts about him shattering Emu's 'crystal' by himself and that Emu can no longer transform, before letting him live for his 'cooperation'. Kuroto then returns to Genm Corp. with a new hairstyle and pulls out the incomplete Kamen Rider Chronicle Gashat, proclaiming that he'll complete the game in no time.



"I'm God! My dreams are...IMMORTAL!!!"

- Kuroto's last words before his death.

Kuroto plans to infect every civilian with the Bugster Virus of DoReMiFa Beat and Drago Knight Hunter Z in order to complete Kamen Rider Chronicle. All hope seemed to be lost for Brave and Snipe, until Emu creates the Maximum Mighty X Gashat and transforms into Ex-Aid Maximum Gamer Level 99. With Ex-Aid's new power from his level upgrade, the three Riders finally managed to defeat Genm Level X once and for all. Ex-Aid used Maximum Gamer's reprogramming ability to delete the Bugster Virus antibody sample in Kuroto's DNA, causing him to be unable to transform into his Rider form. Emu attempts to take him to custody instead of killing him, as he followed his moral value of being a doctor first before being a rider.

Parado then appears and seems to help Kuroto, but quickly strikes him down to the ground and steals his Gashacon Bugvisor. He used it to infect Kuroto with the Dangerous Zombie Gashat, which is filled with both lethal amounts of the Bugster Virus and countless data of his own death. Kuroto struggles with immeasurable pain and starts to disintegrate, screaming in pain as Parado taunts him by saying that Kamen Rider Chronicle now belongs to him. After Parado leaves, Kuroto bellowed that he's a god and that his ambitions will go on forever, screaming madly as he disintegrate into thin air. With this, he is the second rider to experience 'Game Over' after Kiriya.

Chou Super Hero Taisen
A data version of the Zombie Gamer Kamen Rider Genm would fight in the Game World's Chou Super Hero Taisen, leading his own team of Kamen Riders and to compete for the title of Kamen Sentai Gorider. Ultimately, this Genm fell just short of achieving the form of Aka-Rider as he was defeated in the final round by a team led by Emu Hojo, bested by Ex-Aid Robot Action Gamer Level 3.

Kamen Sentai Gorider
As a backup contingency plan, Kuroto created an unbeatable game that would malfunction and take over the world with constantly reviving Bugsters. In the actual game itself, he took the guise of Kazuma Kenzaki, masquerading as an ally amongst other dead Riders such as Kiriya. This impossible game was designed to feed on the despair of the dead Riders after giving them hope so it could revive him in the real world. However his plan was stopped by the real Kazuma Kenzaki and Emu Hojo, who both entered the Game World. He ultimately dies when all of the Dead Riders sacrifice themselves to allow Emu and Kazuma to exit out of the Game World.

The Hidden Level 0 and Return
Poppy was having visions from the memories from her host, where one of them was a young Kuroto told the host that he was developing a way to prevent Bugster infection, so Poppy went to investigate Kuroto's abandoned game studio. Suddenly, a vision of a young Kuroto was passing by, Poppy follows the vision, leading her into a hidden room.

There was a treasure chest in the room, containing a brand new Gamer Driver and the Proto Mighty Action X Origin Gashat. There's also a manual right next to it.

Poppy later brings what she found back to CR, telling the others that Level 0 has the ability to nullify a Bugster's powers. Believing that this is the way to save Emu, she activates the Proto Mighty Action X Origin Gashat and enters the game itself via its title screen. In the game, she finds a Bugster Virus grunt, which turns out to contain data on Kuroto himself. Poppy later attaches the Gamer Driver on the grunt and inserts the Gashat, restoring Kuroto completely, albeit as a Bugster. After which, Kuroto declared he was truly immortal while madly laughing gleefully. Kuroto then transforms into Genm Level 0 and heads to the Next Genome Institute operation theater where Parado is about to finish off Emu. Surprising everyone with his presence, Genm proceeds to attack Parado. Parado then attempts to possess Emu, but fails due to Level 0's Bugster-nullifying effect.

Back at CR, as Poppy explains how she brought Kuroto back, Kuroto proceeds to threaten the doctor Riders once more, though he is hindered by Poppy absorbing him into the Bugvisor II as punishment, due to his status as a Bugster.

The True Purpose behind the Bugster Outbreak and the Creation of Kamen Rider Chronicle
It is then revealed that Kuroto's true intention of starting the Bugster Outbreak and creating Kamen Rider Chronicle was to apply the game-like structure of the Bugsters, specifically their ability for revival to humans. Like the defeated Bugsters, those that had vanished due to the infection will be stored as 'data' and later be given a chance for a 'Continue.' To realize this, he created Kamen Rider Chronicle, a battle for existence between humans and Bugsters, which will serve as a catalyst, if the human side wins, to revive those that had vanished, or more specifically, his mother.

The Arrival Of His Father And His Schemes
to be added

Creating Hyper Muteki
Realizing that should Parado be terminated, Emu's ability to transform would be disabled and the only candidate to defeat Cronus would be lost, Kuroto joined forces with Kiriya and stepped in to defend him from elimination. Losing yet another life, Genm was forced to fight his father alone as Kiriya left to Seito Hospital in light of the revelation that Hiiro was being coerced to intentionally fail to save Taiga's life. Kuroto would lose a further 23 lives, reducing his count to 70, before Emu confronted Cronus.

Irate to find that Emu had terminated Parad and sacrificed his ability to transform, Kuroto ordered him to hand over Hyper Muteki as it was useless to him now. Facing Cronus with Brave, Snipe and Lazer Turbo, Genm and Brave rotated Hyper Mode together to overcome Cronus' pause only for him to elude the Riders. Seeing that Hyper Muteki was in danger of being seized by Cronus, Kuroto retreated with the Gashat. Relived to learn that Emu had actually preserved Parad at the last moment, Kuroto witnessed the defeat of Cronus at the hands of Ex-Aid and Para-DX, resulting in the destruction of the Rider Chronicle Master Gashat to Kuroto's dismay. However, it was at this moment that Masamune used the Bugvisor II's Reset feature to revert Kamen Rider Chronicle to its base settings, resulting in the Master Gashat being restored while Hyper Muteki had shockingly vanished.

However, Kuroto is not without a backup plan, as he died multiple times due to, with his Continue count down to 82, and recreated the Hyper Muteki Gashat while also creating Save Energy Items, updating the game to when Gamedeus was first summoned.

The Gamedeus Vaccine
While Emu and Parado were trying to defeat Gamedeus, Kuroto was forced to help Kiriya create a vaccine for the Gamedeus virus. Since Kuroto had 82 lives left, Kiriya used him as a test dummy to make sure that he was able to create an antibody to the virus. The two of them fought against each other as Kuroto and Kiriya were constantly injected with the Gamedeus virus in an attempt to absorb the immunity data into a blank Dual Gashat. After Kuroto was brought down to 3 lives, he was able to develop an immunity to the virus and cured Kiriya before he was killed by the virus himself. Using this data, Kuroto developed the Doctor Mighty Double X Gashat, which was later used by Emu to cure the people of Gamedeus's virus. In spite of this achievement, however, Kuroto was absorbed into Poppy's Bugvisor Zwei by Kiriya and was handed over to the Ministry of Health. Because of his role in the vaccine's creation, however, Kuroto's sentence was lessened and he sentenced to house arrest inside the DoReMiFa Beat cabinet (which was converted into a prison cell) in CR headquarters. Kuroto then requested to be called "God Dan Kuroto," much to the rest of CR's dismay.

End of Kamen Rider Chronicle
"Emu Hojo! How are you able to transform into Ex-Aid with Parado erased? There is only one answer. You are...once again infected...by Paradooo!!!-"

- Kuroto exposing the reason behind Emu's transformation without Parado, before being absorbed into the Gashacon Bugvisor II yet again. Faced with a horde of Bugster Virus civilians, Genm fought them (with little consideration to their well being), but was fortunately intercepted by a strange new Kamen Rider who, mistaking him for Ex-Aid, intended to collect a sample of his essence. Initially facing the RabbitTank Best Match, another of Genm's lives was inadvertenly taken as the Level 0 Action Gamer was outmatched by GorillaMond. The new Rider, who introduced himself as Build, quickly realized that Kuroto was not Ex-Aid and promptly apologized before leaving.

Soon after, Kuroto found that Poppy had sacrificed her own existence to cure Super Gamedeus's horde through Doctor Mighty XX. In her last words to him, Poppy told Kuroto not to cause trouble and to make fun games. Distraught, Kuroto asserted that she could not disappear without his permission, but her image appeared and silently comforted him before fading, the last sparkle disappearing in his hand as a rainbow appeared overhead. Confronting his father as Zombie Action Gamer, Kuroto fought with Ex-Aid and the other Riders against Super Gamedeus but was unable to affect the behemoth until Emu remembered Asuna's advice and rallied his fellow Riders in reverting to Level 1, allowing them to seperate Masamune from Super Gamedeus, which was neutralized by Doctor Mighty XX through the sacrifice of Parado. Masamune, however, still held the power of Cronus and, with the access to Emu's Muteki Gamer gone, declared that the doctor Riders would face a "Bad End."

Assuming the Zombie Action Gamer, Kuroto engaged his father in one final stand with the other Riders only to be swiftly overwhelmed to the point of losing another life, reduced to only two left. Initiating Pause, Cronus, seemingly victorious, was shockingly beaten back by Ex-Aid, who revealed that Parado's sacrifice had weakened him. After a delayed revival, Kuroto, switching to Level 0, joined the Riders in their Level 2 Gamers to finally defeat Cronus, however, they were unable to stop Masamune from destroying the Rider Chronicle Master Gashat with himself in a final act of spite, robbing them of their chance to retrieve the Game Disease victims from the Proto Gashats. Back at CR, Kuroto returned to captivity where he listened to Emu's speech on behalf of the Ministry of Health, in which Kuroto himself was listed among those who sucumbed to the Game Disease following Zero Day along with his mother and father.

Refusing to accept his loss, Dan got to work immediately and soon enough, successfully restored Poppy Pipopapo from a sample of her virus that he had absorbed into his hand. As well as that, he revealed to Emu that the fact that he could transform after Parado disappeared meant that he too had reinfected Emu from a fragment absorbed into Emu's hand, at which point Parado returned from within Emu. Later, inspired by his earlier encounter, Kuroto created a new game called Kamen Rider Build, the Gashat for which he presented to Emu.

Nazo Toki Labyrinth
From his prison, Kuroto provoked Emu and Parado into playing a new mystery game he had created, Nazo Toki Labyrinth, where they were to solve riddles and mysteries in a mansion to rescue Poppy Pipopapo. Notably, Emu's made him realize that former Genm Corp. CEO Ren Amagasaki, and indeed the majority of Bugsters, were the sons of Kuroto Dan. Ultimately, Emu and Parado's bond brought forth the Knock Out Fighter 2 Gashat, which allowed them both to assume Double Fighter Gamer Level 39 and defeat the new Hatena Bugster. Upon exiting the game, however, the two found Poppy safe and sound, ignorant of her supposed predicament. Coming to believe that Kuroto was testing their bonds, the three wished to thank the Game Master for creating a game that actually brought smiles to those playing it, only to discover, much to their surprise, that Kuroto had escaped his confinement in the tablet, having used the game as a distraction.

Another Ending
Kuroto Dan later returns as the main antagonist throught the entire Another Ending trilogy. In Brave & Snipe, Kuroto went missing, which wondered Emu, Hiiro and Poppy. In reality, Kuroto has revived Lovelica Bugster/Ren Amagasaki and Saki Momose in order to battle Hiiro and Taiga. After Lovelica's defeat and Saki's second death, Taiga is unable to find Cronus' Master Gashat and Bugvisor II, in which unknown to Taiga that they're stolen by Kuroto. In Para-DX with Poppy, Kuroto works alongside with Saiko Yaotome, Michihiko Zaizen's daughter, not only to revive Kuroto's father Masamune, but also to extract Black Parado out of his body. Kuroto also imprisoned Masamune into an unknown location as well as he and Saiko took Poppy hostage in order to add troubles on Parado. After Para-DX defeats his evil doppleganger, Kuroto uses his Bugvisor II to extract Another Parado and later betrays Saiko as he no longer uses her, in which leaves her to despair. Somewhere at the top of the falls, Kuroto, barely naked, creates his own ultimate Gashat, God Maximum Mighty X, as he crazily declares himself to be a god of all gods. In Genm vs. Lazer, he created his own game Zombie Chronicle to summon the Genms in their Zombie Gamer Level X forms as well as providing his own NPC to instruct everyone about his ultimate game: defeating every Genm Zombie Gamer to revive their loved one as a bugster. Kiriya swears to defeat Kuroto. Kuroto shows Kiriya his God Maximum Mighty X as he transformed into his Level 1,000,000,000 form. He defeats Kiriya at first, however, Masamune, who later survived from his imprisonment by defeating a Genm Zombie Gamer, shows up and transforms into Cronus. Cronus seemingly freezes Genm, but eventually he was brutally defeated by his own son. In Masamune's dying breath, he gives Kiriya his Bugvisor II. Kuroto and Kiriya battled for the last time. His God Maximum Mighty X was finally negated due to Masamune's imbuing the Buggle Driver II with the Reset ability. Kuroto is finally defeated by Kiriya as well as the Zombie Chronicle is negated (restoring the infected Zombie Bugsters back to normal), thus his sanity went back as he simply called himself Kuroto Dan as he vanishes. Kiriya, later restored into human thanks to God Maximum Mighty X Gashat by Saiko, pays his respects to Kuroto and sees the vision of Kuroto and he tells him that his games never end.

Kamen Rider Zi-O
"True, I am Dan Kuroto. But, After I acquire the power of King, that name is merely an echo. Now I have become....KING DAN KUROTO!!!"

- Kuroto introduces himself. Due to the alteration of timeline, Kuroto Dan's events such as his first transformation as Kamen Rider Genm, his first death and his revival as a Bugster as well as the Genm Corp. are negated due to Sougo obtaining the Ex-Aid Ridewatch earlier and he is still alive in 2018 as well as retaining his God-complex, psychotic and foolish personalities. As Woz introduces the next legend, he is seen holding his Dangerous Zombie Gashat as he maniacally laughs alone in his office.

Kuroto, donning his royal garb and dubbing himself as King Kuroto Dan (檀 黎斗 王), is the CEO of the Dan Foundation. Somewhere in the year 2010, Time Jacker Uhr made a contract with Kuroto Dan to become Another OOO. Using his authority, Kuroto established the Foundation in 2016 after the death of his father, and the Foundation soon grew into a mega corporation within two years. As an Another Rider, he uses cell medals to summon Waste Yummies to subjugate the people. Kuroto holds a press conference and declares that Dan Foundation will rule as a sovereign nation independent from Japan, with all of their properties becoming their own national territory where Japan's own laws become null and void. However, when a member of the National Diet rejects Kuroto's rule, Kuroto tosses a Cell Medal on him to become a Waste Yummy. It is also reported that Kuroto has held a member of the National Diet hostage. After they rescued civilians from Waste Yummies, the three meet Kuroto Dan and he transforms himself into Another OOO as he is about to attack them before the Taka Watchroid suddenly shows up out from nowhere and attacking Another OOO. The Genm Ridewatch suddenly drops from Another OOO while Tsukuyomi sees Another OOO's year number at the back, initially seeing it as 2016 as he escapes into his own castle. While Sougo decides to follow Kuroto, Geiz and Tsukuyomi examine the Genm Ridewatch, which is similar to Ex-Aid's, before traveling back to the year 2016 in order to confront Another OOO. Geiz uses the Genm Ridewatch to become Geiz Genm Armor and manage to defeat Another OOO, but his efforts remain futile as Another OOO revived, as confirmed by Sougo in 2018. Tsukuyomi realizes that Another OOO was not created in 2016, but actually way earlier in 2010, due of Another OOO digits in the back had slight discrepancy.

Back in 2018, as Kuroto decides on the motif of his next royal garb to be based on a zombie, Hina Izumi, an employee of the Foundation, decides to question his rule. Kuroto, applauding her boldness, decides to take her as his queen, but her objections incite the anger of Kuroto. Kuroto is then about to kill Hina, but he was interrupted by an enthusiastic Sougo. After Sougo explained his reason and ambitions, Kuroto was initially vexed by Sougo's idea. Nevertheless, he appoints Sougo as one of his loyal retainers. After observing Zi-O's battle with Geiz, Kuroto promotes Sougo to captain of the royal guard as he orders his Yummy servants to imprison Hina in the same room as the Diet member taken hostage, who turns out to be Eiji Hino.

In order to prevent Kuroto Dan from dominating Japan, Sougo has been provided two Ridewatches of OOO (Tatoba and Tajadol Combos respectively) by Eiji, before going to the year 2010. Zi-O uses the OOO Tatoba Combo Ridewatch to equip OOOArmor and OOO Tajadol Combo Ridewatch on his Time Mazine to defeat Another OOO, rendering Kuroto unconscious.

A year later, Kuroto was presumably attacked by Hiryu Kakogawa and had his power of Another OOO taken from him offscreen, as by the start of episode 25, Hiryu can already assume the form of Another OOO.

Personality
When he was young, Kuroto was a good-hearted individual who had a genuine passion for developing games. However, he would gradually develop a superiority complex, believing no one could be as talented as him. He had a loving relationship with his mother, and it was her death that would ultimately send him spiraling down into insanity during his adulthood, as he did not put his trust in the medical world in saving his mother, and believed that only he could accomplish it with his own talents.

During his initial tenure as CEO of Genm Corp, Kuroto appeared to be a polite and humble man, both with a sense of sympathy and compassion. Despite this, his decisions are of questionable morality. Behind closed doors, Kuroto is shown to be psychotic, worsened by over usage of his Proto Gashats. He slowly becomes deranged over time, indulging himself with a God complex, believing that survival of the fittest is the only thing that matters in battle.

He remains prideful in regarding his skill as being the best, taking pride in the creation of Gashats as something that only he can make. When Emu and Tsukuru created the Mighty Brother XX and JuJu Burger Gashats respectively, Kuroto lashes out attempting to retrieve it to destroy them, displaying this form of behavior to the most extreme when Emu attempted to use the Maximum Mighty X Gashat in its incomplete form, even going as far as calling both Mighty Brothers XX and Maximum Mighty X "bootleg games". Despite this, he uses the data he collected from fighting Emu who used this Gashat to complete the Gashat Gear Dual for Parado, and the Gashat Gear Dual β which is currently in the hands of Hiiro Kagami and Taiga Hanaya.

His malignant narcissism is also taken to the extreme when he attempts to kill a patient to obtain data on death needed to complete a Gashat he was developing before using data on his own death to complete it. Despite his instability, Kuroto appears to have some form of self-control after constant usage of the Dangerous Zombie Gashat. However, his obsession with immortality through the aforementioned Gashat made him even more unhinged.

Kuroto also views those who are no longer in the scope of his plans to be disposable as he murders Kiriya Kujo and Motors once he saw that they were no longer useful in his plans. This has seemingly led to Parado severing ties with Kuroto as the death of Motors was not from playing the game, but from Kuroto indulging in his god complex as the "Game Master" and thus being used as bait.

His delusions would become his fatal flaw, as Parado takes advantage of this when he murders Kuroto after his defeat by Emu and claimed Kamen Rider Chronicle for his own purpose. The same fatal flaw is also present in Kamen Sentai Gorider, and not only he rubs it in to the deceased Riders his desire to resurrect himself, but he also inadvertently attracted the attention of the real Kenzaki, not knowing that the presence of a Joker Undead can destroy his game world. Ever since he is properly revived, Kuroto becomes fully aware that his excessive pride of his own talents is proven to be his greatest weakness, as shown when he is creating (and later attempting to use) the Hyper Muteki Gashat.

After his resurrection, Kuroto's insanity is still intact, with a vindictive streak; hellbent in making Parado pay for his treachery. The only person he holds dearly to ensure he never loses his humanity is his mother Sakurako Dan, who was the host of Asuna Karino/Poppy Pipopapo. As a result, Kuroto regains traces of his sanity, but continues to boast himself as the "New" Kuroto Dan, along with his "godly" talent. His love towards his mother would eventually result in him developing a familial relationship with Poppy as well, to the point that Poppy's eventual sacrifice to save everyone from Gamedeus' infection saddened him to tears.

In spite of his apparent viciousness and insanity, as well as others' perceptions of him, Kuroto's actions did have purpose as the purpose of Kamen Rider Chronicle was to bring back every human who succumbed to the Bugster Virus by defeating all of the Bugsters, especially his own mother whom he infected. Through this, Kuroto, while antagonistic, had good intentions, albeit descending into insanity due to the prolonged effects of the Proto Gashats. After his father, Masamune emerged as Kamen Rider Cronus, Kuroto realizes that his actions was part of his father's ploy to claim the Kamen Rider Chronicle Gashat. Kuroto himself is visibly horrified at his father murdering Lovelica, and would also develop a hatred towards his father who took the products that Kuroto himself created.

Though his insanity was once regarded to be intimidating, after his revival, this devolves into nothing more than just making himself look foolish, with the Riders no longer taking his viciousness seriously. When his insanity is pushed to the extreme, Kuroto would end up laughing maniacally and screaming incoherently like a madman. On occasion, he would also resort to impulsive actions, like banging his head on a wall after learning his father had become Cronus, and pestering Emu by shaking his legs violently while in a rush to recreate Hyper Muteki.

However, all of this was later revealed to be an elaborate ruse, as Kuroto remained adamant on his plan to create the ultimate game, only helping CR defeat Masamune just so he could get rid of another obstacle in his plan. When his true schemes were uncovered, he clearly showed no remorse for deceiving the Riders, his god complex being pushed to the extreme upon the completion of the God Maximum Mighty X Gashat, though behind all of this, the pain of losing his own mother still remained. After getting reassured by Kiriya Kujo that he could finally count on the advancements of the medical world, he departed upon losing his final life, seemingly at peace with himself, while still wondering if society would develop to be more accepting of his talents if he were to be reborn.

When Ex-Aid's history was erased as a result of the Time Jackers' meddling in 2016 and subsequently obtaining the power of Another OOO six years prior, (King) Kuroto's personality is the same as he was in the original timeline, but at the same time has evolved into a power-hungry, ruthless tyrant. In that he would declare war against the world and turn anyone into Waste Yummies who are foolish enough to defy him. This display of abuse of power earned him the ire of both Sougo and Woz, the former being who desire to be a benevolent ruler with the desire to protect anyone, while the prophet mocks him after being defeated by Sougo and sees Kuroto as a "fertilizer" for his future master's growth to become an demon king after being defeated.

While as New/God Kuroto Dan, Kuroto has his own catchphrase after transforming, which is an inverted version of Emu's. I'll clear this even if it means using continues! (コンティニューしてでもクリアする)

Powers and Abilities
As stated by him, Genm's parameters are originally the same as Ex-Aid's, so his overwhelming power didn't come from his equipment, but his own combat experience and ability. This is shown when he easily defeated some of the Ex-Aid Riders, even veterans like Taiga Hanaya, many times. He's even on par with Kamen Riders Specter and Necrom, even while the former is in his strongest form.
 * Genius-Level Intellect: Kuroto has a formidable mind. He is responsible for the creation of all but six Gashats (Mighty Brothers XX, Ju Ju Burger, Maximum Mighty X, Toki Meki Crisis, a second copy of Bakusou Bike, and Taddle Legacy). He has shown an ability to quickly adjust to new situations and predict the actions of other riders almost perfectly, allowing him to almost completely mastermind both Bugster outbreaks.
 * Bicycle Proficiency: He is extremely skilled in bicycling, which allows him to effectively use his Sports Gamer bicycle as both a weapon and a transport to defeat a large group of Gamma Commandos and Superiors, as well as Brave and Snipe.
 * Close Combat Skills: He has proven himself to be a formidable combatant, as he easily overwhelmed Specter and Necrom at once when the former was in his strongest form.
 * Quick Retreat: Through unknown means, after he recovered his Shakariki Sports Gashat, he faded into thin air. This is also shown when he decided to save Aranbura and the Collabos Bugsters. He is also able to do so in his civilian form, escaping after he just revealed his true identity as Genm.
 * Acquired Game Illness Immunity: As a result of a secret compatibility surgery not unlike the standard one for CR candidates, Kuroto Dan is immune to the Game Illness, and able to transform into a Kamen Rider. This immunity is later negated due to Ex-Aid Level 99's reprogramming ability and when he revived as a Bugster, he installs his human DNA to use said Driver.
 * Immortality: When he stabbed the Gashacon Bugvisor into his emptied Rider Gauge, he gained the immortality ability of the Dangerous Zombie Gashat to freeze the Gauge, allowing him to recover without injury from any, even fatal damage. This power was removed after Ex-Aid reprogrammed it away, with his Rider Gauge returning to normal working condition.
 * Cloning: After gaining the true power of Level X, he is able to produce many data clones of himself, allowing him to be at many places at the same time. According to Kuroto, this power is based on a fictional zombie's ability to self-reproduce through their own cells.
 * Data Saving: Using the Proto Mighty Action X Origin Gashat, Kuroto was able to create a "save data" version of himself, allowing himself to be revived again as a Bugster.
 * Bugster Ability Restriction: One of the functions of Level 0 Gashats. Kuroto can seal certain abilities of Bugsters who are in his game area, such as host possession.
 * Level Regression: Thanks to Level 0's power being over nothingness, by touching a Bugster, Kuroto can degrade their Levels to reduce their powers.
 * Data Mimicry: One of the abilities of a Bugster, he can travel through the cyberspace by transforming into computer data. This is exhibited when he began using Poppy's arcade room as his own living space, much to her dismay.
 * Teleportation: After being revived as a Bugster, Kuroto can teleport himself for simple travel or evade incoming assaults.
 * Continue: Using the alpha version Proto Mighty Action X Origin Gashat, Kuroto will revive and "continue" his personal life after being killed once and twice, reappearing from a purple pipe labeled "Continue". The Gashat gives him 99 lives.

Weaknesses

 * Gashacon Bugvisors: Being revived as a Bugster recently, Kuroto can be absorbed and preserved in a Gashacon Bugvisor in any time. This has only shown accessible in human form. However, this has also proven to be an advantage of some sort, as Kuroto can enter Bugvisors at will as well, allowing him to bypass Cronus's time stopping Pause ability while inside the Buggle Driver II of Cronus.
 * Level 0: As stated by it's name, Level 0 is the most lowest level among all the levels, making Kuroto extremely vulnerable to any type of attacks, even the orthodox attacks can deal great damage on him. This disadvantage can be covered by utilizing advanced-level Gashats, as well as his Continue ability.
 * God Complex: Kuroto suffers from a massive god complex, viewing his work as being of godly quality, which is fueled by his technological prowess and has only worsened with time. This narcissism has proven to be Kuroto's undoing on multiple occasions, often clouding his reasoning and slowing his ability to adjust to unforseen situations, such as sending him into a blind rage upon discovering anyone other than him has created a new Gashat.
 * Lack of Awareness: Despite his genius-level intellect, Kuroto completely lacks self-awareness and a sense that the world does not revolve around him. Perhaps the greatest example of this is his becoming so engrossed in boasting about Hyper Muteki's invincibility and immunity to Cronus' time stop abilities that he ran down its time limit and subsequently lost the Gashat to Cronus.
 * Overworking: As shown in episode 41, Kuroto's fanatical obsession over his "genius" work makes him very vulnerable to Karōshi, or "overwork death". This obsession with finishing his games can lead to him losing huge chunks of his extra life stock.
 * OOO Ridewatch: Kuroto as Another OOO can only be destroyed using the power of his Kamen Rider counterpart.

Devices

 * Gamer Driver - Transformation device.
 * Rider Gashat - Transformation trinkets.
 * Kimewaza Slot Holder - Carrier strap for the Rider Gashats.
 * Bugster Buckle - additional buckle device When attached to the Gashacon Bugvisor to become the Buggle Driver.
 * Buggle Driver - Secondary Transformation device combined from the Gashacon Bugvisor and the Bugster Buckle.
 * Blay Buckle: Blade transformation belt used in Kamen Sentai Gorider
 * Rouze Card: Allow Blade to attack, depending on which card is used
 * Anotherwatch - Transformation trinket

Weapons

 * Gashacon Bugvisor - Standard sidearm weapon, and also a secondary Transformation device combined with the Bugster Buckle to become the Buggle Driver. It's also Graphite's transformation device until Kuroto takes it back. When Ex-Aid renders Kuroto powerless from being a Rider anymore, Parado took it from him and kill him.
 * Gashacon Sparrow - Zombie Gamer Level X's weapon taken from Kamen Rider Lazer Chambara Bike Gamer Level 3, until Ex-Aid renders Kuroto powerless from being a Rider anymore and the Gashat is taken back to Emu.
 * Gashacon Sword - Brave's primary blade weapon that Genm steals until Brave Level 50 takes it back.
 * Trick Flywheels - Sports Action Gamer Level 3's personal weapons.
 * Gashacon Bugvisor II - Sidearm weapon used in Genm Action Gamer Level 0 to replace his lost Gashacon Bugvisor.
 * Gashacon Breaker - Genm Action Gamer Level 0 and Zombie Action Gamer Level X-0's personal weapon.
 * Gashacon Key Slasher -
 * Blay Rouzer: Blade Personal weapon used in Kamen Sentai Gorider

Vehicles

 * Sports Gamer - Genm's Level 3 Rider Machine summoned by the Shakariki Sports Gashat, until Ex-Aid defeats him and Genm no longer needing that Gashat anymore.
 * Kamen Rider Lazer Bike Gamer Level 2 - Lazer's Rider Machine Mode that Genm can use to ride.

Rouze Combos
Lightning Sonic This combo enhances the Lighting Blast combo with the Mach Jaguar card's speed and agility boosting.
 * Cards required: Kick Locust (5) + Thunder Deer (6) + Mach Jaguar (9)

(Used in Kamen Sentai Gorider)

(Jack) Lightning Slash This combo allows Blade to excute a deadly slash supplemented with lightning from his Blay Rouzer. In Jack Form, this combo's strength is increased by his flying ability.
 * Cards required: Thunder Deer (6) + Slash Lizard (2)

(Used in Kamen Sentai Gorider)

Relationships

 * CR:
 * Emu Hojo: Emu respects him and see him as a good man. Although Dan helps him in his civilian form, Dan acts hostile/even murderous to him as Genm. However, Emu is oblivious of this fact until Dan reveals himself to the Riders once his battle data gathering has been completed. Turns out, Kuroto had known Emu 16 years ago and infected him with Bugster when Emu was a kid, shortly before he had a traffic accident and placed in a special surgery held by Kyotaro Hinata. Then the experiment on Emu by Michihiko Zaizen under request of Kuroto himself in 2010. Dan's relation with him only grew worse after seeing the Mighty Brothers XX Gashat, a game he didn't create, so he personally wants to kill Emu and wipe the data of the game out completely. Kuroto compares Emu and his idealistic, kind nature as a doctor with a crystal; once it's shattered, he won't be the same doctor again. He has said to Emu that he will soon destroy his crystal. Emu often calls Dan Genm when he transforms into Genm or not. Emu tries to save Dan after defeating him as a means of taking responsibility for his crimes, only to fail when Parado murders him in front of Emu. When Kuroto is later revived, though Emu does not forgive him, he gives Kuroto the chance to make up for his sins.
 * Asuna Karino/Poppy Pipopapo: Asuna affectionately calls Dan as 社長 and greatly respects him. Dan in return also trusts Poppy for information regarding Gashats and the CR in his civilian form. Apparently, Poppy soon learns she was just a pawn to Dan when he reveals himself to the Riders that he is Genm, after he gathered enough battle data for his next plan. Later, after Kuroto's revival as a Bugster, he appears to be at Poppy's beck and call instead much to his dismay, due to Poppy being able to control him at will using the Gashacon Bugvisor II. Though he was originally bent on seeking revenge on Parado and acting on his own, Poppy's gratitude towards Kuroto for her creation (Affirming that he is her father), as well as she reminding him of his own mother, somewhat convinced Kuroto to side with the Riders for the time being.
 * Hiiro Kagami: They didn't interact much, but Hiiro shows some respect to him, although is somehow dubious of Dan's behavior until Dan reveals himself to the Riders of being Genm all along once his battle data gathering has been completed.
 * Kiriya Kujo: Kiriya saw Dan as his nemesis after he saw Dan's transformation into Genm. Dan, however, outsmarts him with Parado's help. Kiriya's hatred grows even further after that incident, even blackmailing him just to vent his anger. Strangely enough, however, he claims that he's committing all these actions to find out the truth of how the Bugsters came to the real world, not unlike Kiriya's search for the truth behind the Bugsters. Unfortunately, Kiriya was too late to notice and stop Dan's next move, after Dan finally reveals himself to the Riders once his battle data gathering has been completed. As Kiriya is a greater threat to Dan for his meddling, he then murdered Kiriya as Genm Zombie Gamer Level X and stole his Gashacon Sparrow for his own personal use. However, Ex-Aid Level 99 managed to render Genm powerless from being a Rider anymore and retrieved the Giri Giri Chambara Gashat back. After their respective revivals, Kiriya got his payback by injecting Kuroto several times with a lethal dose of Gamedeus virus, which he planned for the creation of Doctor Mighty XX. Four years later, Kuroto initiates Zombie Chronicle and Kiriya manages to stop Kuroto by depleting his last life, thus killing him permanently. However, After Emu and Asuna explained that Kuroto actually wants to be defeated and that God Maximum Mighty X Gashat restores his Human body, Kiriya was moved by his foe sacrifice. Kiriya decides to give Kuroto his final respect at their last battlefield and promised to always remember him.
 * Taiga Hanaya: Taiga mocks him because of Dan's laid-back behavior in civilian form. Although, Dan paid him no heed, even when Taiga bought his Gamer Driver back. Dan states that his Rider skills are undeniable despite how dangerous he is. Once Dan reveals himself to the Riders after he gathered enough battle data from Snipe and other Riders' battle, Taiga finally found out that he's being used by Dan.
 * Ministry of Health:
 * Kyotaro Hinata: Dan helped Kyotaro in the Gamer Driver and Gashat development. As such, they seem to be on good terms, until Kuroto reveal his true colors to the four doctor Kamen Riders once he completed his first evil plan. After his revival, he gave Kuroto a non-severe punishment as a result of creating an anti-Gamedeus vaccine, by locking him inside Poppy's DoReMiFa Beat arcade booth.
 * Bugsters:
 * Graphite: Dan seems to see Graphite as a tool for his goals, Graphite in return didn't like Dan either.
 * Parado: Dan is often helped by Parado regardless of his mission as Genm. Parado also noted that Dan's necessary for his plan. However, his relationship with Parado appears to grow more bitter when Parado destroyed the Revol Bugster against Dan's deterrence. It gets worse even further when Dan himself does the same deed to the Burgermon Bugster right in front of Parado, though he completely destroys him instead of leaving any remains to absorb into the Bugvisor like Parado did. Thus, driving a wedge on their partnership. Ultimately, this becomes the reason Parado is fed up with his delusions when he kills Dan with no signs of remorse. When Kuroto is revived, he swears revenge on Parado. However, upon finding out that Parado needs to remain alive for Emu to access Ex-Aid Muteki Gamer and clear Kamen Rider Chronicle once and for all by defeating Gemdeus, Kuroto and Parado join forces for the time being.
 * Masamune Dan: His father and the first CEO of Genm Corp before Kuroto. During his childhood life 16 years ago, their relationship was well. In 2010/2011, he become corrupted and betrayed his father by framing him that he started the Zero Day, although it was revealed that his father used him as a "pawn" upon his true nature of completing the Kamen Rider Chronicle. Despite that, all of Kuroto's efforts in helping the Doctor Riders worked very well to the point he outsmarts his father. Kuroto seems to talk to him disrespectfully calling his by his name instead of Dad. Four years later, Kuroto manage to revive and imprisoned Masamune to gain his dad Bugster Virus, Another Parado, thus completing God Maximum Mighty X. Masamune then decide to battle his son as Cronus, but utterly defeated by Genm Level Billion. Before his second death however, Masamune give Kiriya his Bugvisor Zwei, imbued with Masamune Reset Power to stop Kuroto insanity for good, in which Kiriya accomplish as Lazer Level X.
 * Sakurako Dan: Kuroto was a loving son towards his mother while she was still alive. Even after her death, Kuroto seemed to never forget the memory of his mother.
 * Dan Foundation:
 * Hina Izumi: Hina was one of Dan Foundation workers under Dan Kuroto. Hina was ordered to make Kuroto new royal garment, but she outwardly refuses. Impressed by her tenacity, Kuroto considers to make Hina his Queen, but once again she refuses. Kuroto then about to kill Hina due to her being rebellious to him if Sougo didn't interfere. In the end, Kuroto decides to Imprison Hina.
 * Sougo Tokiwa: Sougo exhibits a fanatical-like admiration upon meeting King Dan Kuroto for the first time since he never met a still-existing King before. Sougo then decides to gain Kuroto trust by defeating Geiz, which he succeeded. Kuroto then appoints Sougo as his Royal Guard. However, all of this was a ruse from Sougo in order to accomplish his own ambition of being a King. After learning what is vital for a Benevolent Ruler by Eiji Hino, Sougo declares that there is only one King allowed in this era and that Kuroto is not fit to be a King before soundly defeats Kuroto as Zi-O OOO Armor.

Portrayal
Kuroto Dan is portrayed by Tetsuya Iwanaga (岩永 徹也). As a teenager, he is portrayed by Mitsumasa Sato (佐藤 光将). Assuming the form of Kazuma Kenzaki in Kamen Sentai Gorider, he is portrayed by Takayuki Tsubaki (椿 隆之).

As Kamen Rider Genm, his suit actor is Satoshi Fujita (藤田 慧) in Level 1 and Yuya Nawata (縄田 雄哉) in Level 2 to Level X. Nawata quit due to unknown reasons and was substituted out for Yuji Nakata (中田 裕士) in Episode 23, and resumes his role as Genm Level X-0. Kosuke Asai (浅井 宏輔) was the suit actor for Genm Level 0. Genm's bike action suit stunt actor is Keigō Arizono (有薗 啓剛).

Etymology
Kuroto's first name is a play on the Japanese words for black (黒) and proto (プロト). This is a reference to Genm being a dominantly black-colored Rider that is also a prototype of the main Rider, Ex-Aid.

Memes

 * After Kuroto reveals to Emu's status as patient zero of the Bugster virus in Episode 18, one of the notable memes is him laughing madly at the sight of Emu's subsequent outbreak. This is the moment where he became more erratic and infamously started became a more popular character.
 * Originally Kuroto's laughter wasn't scripted and was ad-libbed by Tetsuya Iwanaga himself, upon coming up with the idea noticing Emu's character fighting for making everybody smile except Kuroto's character.
 * In Episode 23, Kuroto was lethally infected by the Dangerous Zombie virus at the hands of Parado. As he struggles, another viral meme is death and his line "I'm God! My dreams are...IMMORTAL!!!".
 * After his resurrection as a Bugster, a common running gag for Kuroto is insisting the others to be refered with his self-proclaimed name New Kuroto Dan (新檀 黎斗) and later Kuroto Dan Shin (檀 黎斗 神).
 * This also applies whenever he gets a Game Over, Kuroto will usually re-appear from a purple pipe, usually with hilarious theatrics.
 * The warp pipe which the revived Kuroto Dan uses is named as Continue Claypipe (コンティニュー土管) by fans and the blog of Bandai Candy Hatena Blog. Because of the warp pipe's role to revive Kuroto after each Game Overs, it receive multiple memes from fans by reviving various characters, including those who received tragic deaths.