This article is about a/an rider in Kamen Rider Zi-O.

"You cannot possibly defeat me. Do you know why? Because I was born to be king!"
―Oma Zi-O's declaration of his ironfist rule in 2068.[src]

"If you're that against becoming a demon king...then let me tell you what you can do. Throw away that belt! If you do that, then you won't become me."
―Oma Zi-O offering his past self a chance to alter his destiny[src]

"My youthful self. I knew you could never give up your dream ... for you are me."
―Oma Zi-O after he is restored to existence[src]

Sougo Tokiwa (常磐ソウゴ Tokiwa Sōgo)[1], alternatively spelt Sogo Tokiwa[2] is the future version of his present day self who rules the Earth in 2068 as Oma Zi-O (オーマジオウ Ōma Jiō), alternatively spelled Ohma Zi-O, and also referred to as the Demon King (魔王 Ma Ō) by the characters of the series.


At some point, Sougo Tokiwa acquired the white half of the Zi-O Ridewatch II and completed it using its Mirror World Part. On the day known as Oma's Day, the Ridewatch triggered his transformation into Oma Zi-O and used seven giant monstrous machines called Dai Mazines to destroy the world and become the revered "Demon King." Back to 2068 Oma Zi-O was the original owner of the Ridewatches of Kamen Riders Drive and Ghost before they were stolen by Geiz. Ghost Hunter 2018

At the start of the series, Tsukuyomi and Geiz, along with the Resistance, are attempting to wage a battle against Sougo, only for him to effortlessly destroy them utterly before declaring that none of them were capable of defeating him because he was born to be king. Sometime after this, Tsukuyomi and Geiz traveled to the past, one intent on changing Sougo's fate of becoming Oma Zi-O and the other attempting to kill him before he can embark on the path. Kingdom 2068

Meeting his youthful self

Meeting older self

Sougo meeting his younger self.

One day as he sat in his chrysanthemum throne in an isolated field, Sougo sensed his younger self, who was sent to 2068 by a destroyer of worlds, and ponders if his youthful self wanted to speak to him. Reaching his decision, Sougo utilized the Ryuki RideWatch and summoned Dragreder to bring both his past self and Tsukuyomi to him. As the past Sougo spotted him but unsure of his identity, Sougo told him they'll talk about the dream they've both had in their youth about the Dai Mazine destroying the city, stating every exact detail right down to the man who approached them. As the past Sougo realized who it was, Sougo stood up as the sudare rises, revealing his face to both his past self and Tsukuyomi. Laughing, Sougo asked his younger self why he was shocked and surmised his youthful self was in denial about becoming the demon king. The past Sougo continues to protest, but Sougo assured him it's their dream to become king and save the world before telling the past Sougo this is their future. Even when the past Sougo decreed he'll become the kind and greatest demon king, Sougo laughed and revealed it his thought as well, which made the past Sougo decide to defeat him now.

As he watched the past Sougo shove Tsukuyomi aside and transformed into Kamen Rider Zi-O, Sougo laughed as Zi-O executed a Fourze Suresure Shooting from his Zikan Girade Gun mode. The attack destroyed the throne, but Sougo emerged unscathed by transforming into Oma Zi-O, which shocked the past Zi-O while Oma Zi-O described the nostalgia before countering with a golden shockwave, sending Zi-O flying through the dirt. Approaching Zi-O, Oma Zi-O assured him at some point in his time, he'll receive the power of a demon king, but Zi-O dismissed it, transformed into Kamen Rider Zi-O Decade Armor, and performed a Kuuga Dual Time Break Rider slash with the HeiSaber. Pulling out the Kuuga Ridewatch, Oma Zi-O cancelled Zi-O's attack and countered with Kuuga Rider kick, sending Zi-O back on the ground. Oma Zi-O told his younger self the indomitable will is a sign of a king, but Zi-O told him to shut up and executed a Kiva Dual Time Break, which was countered by Oma Zi-O's Kiva-based dark energy bats summoned via Kiva Ridewatch, knocking Zi-O to his knees. Refusing to accept defeat, Zi-O attempted to attack his future self with a Ryuki Dual Time Break Rider slash, but Oma Zi-O used the Ryuki Ridewatch to summon Dragreder and made the dragon attack Zi-O, knocking him back on the dirt. As Tsukuyomi moved closer and Zi-O became overwhelmed by his future self's strength, Oma Zi-O offered him a choice: if the past Zi-O refuses to accept his fate as a malicious demon king, he must destroy his Ziku-Driver. Back to 2068

As Zi-O pondered over this choice, Oma Zi-O generated golden energy from his clock hand-style cape and launched it at Zi-O, drawing the rider closer before detonating it and forcing the past Sougo out of his transformation. After Tsukuyomi ran to the past Sougo's side, Oma Zi-O created a small time window to reveal Kasshin overpowering Kamen Rider Geiz Faiz Armor, stating it won't be long before Geiz is killed. Telling the past Sougo to return to 2018, Oma Zi-O created a time portal and allowed both his past self and Tsukuyomi to pass through it before closing the portal and announced his interest in which decision his past self will make. Cancelling his transformation before sitting back on his throne, Sougo sensed his past self letting Geiz destroy his Ziku-Driver and laughed as he was erased from the timeline. After the past Sougo, despite knowing the horror of becoming the demon king, became Kamen Rider Zi-O again, Sougo was restored back in the timeline, laughing as he knew his past self couldn't give up his dream. Forever King 2018

Message from the Future

"There are six powers left for you to obtain. Obtaining all the watches is... your path towards kingship. The path to conquest!"
―Oma Zi-O presenting his past self the final Ridewatches to become the Demon King.[src]
Oma Zi-O shows Sougo a Kiva Ridewatch, Kabuto Ridewatch, Agito Ridewatch, Drive Ridewatch, Den-O Ridewatch and Hibiki Ridewatch

After the past Sougo acquired the power of Trinity and the Blade Ridewatch, Daiki Kaito presented Sougo and Geiz with a message from Oma Zi-O, who congratulated his past self for collecting the Blade Ridewatch. Oma Zi-O then manifested six Ridewatches: Agito, Hibiki, Kabuto, Den-O, Kiva, and Drive, and told the past Sougo that he will obtain kingship and the path of conquest once he acquire the remaining six Rider powers. 2019: Trinity Has Begun!

Duel of the Demon Kings & Time Alteration

"My youthful self."
"Oma Zi-O."
"So you've obtained the power of all the Riders. Regardless, you're still no match for me."
"Let's see. I've got a feeling this is going to work out.
―Oma Zi-O challenging his past incarnate to test his new power.[src]

GrandZi-O prepares to fight OmaZi-O.

After his past self obtained the Grand Zi-O watch and defeated Another Den-O, Oma Zi-O teleported Sougo back to 2068 and forced him in his Grand Zi-O form. Standing in front of Grand Zi-O, Oma Zi-O congratulated his past incarnate for obtain all of the Rider powers, but claimed he's still no match for him. Grand Zi-O, believing he can fare against his future self, challenged Oma Zi-O, which he accepted and told him to come as he manifested two Rouze Cards and Double's cyclone energy attacks, which Grand Zi-O deflected as he ran at Oma Zi-O. 2017: Grand Climax! Face to face, Oma Zi-O traded punches with Grand Zi-O before both riders forced one another back and summoned manifestations of Kamen Riders Kuuga and Build. As the manifestations fought, Oma Zi-O teleported in front of Grand Zi-O and resumed their battle, blocking every one of Grand Zi-O's attacks with no effort. Despite Grand Zi-O's proclamation to end his tyrannic rule after Kuuga and Build's manifestations dissipated, Oma Zi-O reminds him they're still Sougo Tokiwa and scolds his past self for not acknowledging his destiny, angering Grand Zi-O as he summoned a manifestation of Drive. Oma Zi-O took control of the manifestation and corrupted it, forcing it to attack Grand Zi-O and defeat him with a Full Throttle Rider kick, cancelling the past Sougo's transformation.

As Woz teleported and rushed to the past Sougo's side, who wondered why he lost, Oma Zi-O told him he hasn't truly acquired all of the Kamen Riders' powers as the Drive Ridewatch was the one Geiz stole from Oma Zi-O. As the past Sougo refuses to submit, Oma Zi-O scolds his stupidity and fires a shockwave at his past incarnate, forcing Woz to send the past Sougo back to 2019. Oma Zi-O commended Woz for his action as the Drive manifestation dissipated and chronal energy surged through 2068. Oma Zi-O realized that someone in the past altered the timeline, placing his current one in jeopardy if the new one cements in history. 2019: World, Reset


From what little is known about him, Oma Zi-O is shown to be very arrogant due to his tremendous power, proclaiming that he was chosen to be the ruler of the world from birth. He does not even view the resistance fighters as serious threats. His arrogance is not without merit, however, as his battle against his younger self demonstrates impressive mastery over his abilities of his predecessors. Furthermore, he is extremely confident and fearless, as he openly suggests his past self to throw away the Ziku-Driver, an action would result in his own temporal erasure, and even arrogantly laughed as he is disappearing from the timeline, suggesting that everything young Sougo would do are within his calculation and expectation.

However, he apparently still believes that his tyranny has somehow saved the world. When young Sougo claims that he wishes to become the greatest Demon King, this Sougo replies that he did become the greatest Demon King, not in the sense of kindness, but in the sense of perfection.

Powers & Abilities

  • Disintegration: Oma Zi-O can send out a powerful wave of energy that can disintegrate anything in its path.
  • Enhanced Awareness: Oma Zi-O immediately sensed and identified the threat of incoming missiles.
  • Velocity Manipulation: It is shown that Oma Zi-O can freeze dozens of missiles.
  • Time Manipulation: Oma Zi-O can freeze time before he can disintegrate enemies. According to Tsukuyomi, Oma Zi-O has all of the abilities that come with Sougo Tokiwa's Zi-O Ridewatch II, thus implying that Oma Zi-O can reverse time as well.
  • Timeline Alteration: Tsukuyomi theorizes that Sougo's dreaming ability causes his encounters with the future Riders to actually happen in reality, an ability that according to her, Oma Zi-O also seems to possess.
  • Telekinesis: When an army of Time Mazines tried to crush Oma Zi-O, he simply used telekinesis to hurl them into each other.
  • Time Portal Creation: Oma Zi-O can create time portals, which are even capable of forcefully pulling a person into themselves. Forever King 20182017: Grand Climax!
  • Keen Manipulator: Like his past iteration, the future Sougo is also manipulative, even towards his younger self.
  • Legend Riders' Powers: Oma Zi-O has the powers of all the Riders prior to the year 2068.[3] He can tap into their powers by activating their Ridewatches as well as simply through his will. He can also summon Rider clones and even corrupt the ones summoned by others.2019: World, Reset
    • Kuuga: Summons an energy construct of Linto Hieroglyphics to create an energy kick.
    • Kiva: Summons a colony of energy bats.
    • Ryuki: Summons Dragreder to attack his target.
    • Blade: Summons two large Rouze Cards to attack his target.
    • Double: Summons a green/purple colored energy cyclone.


  • Sougo Tokiwa: Because Oma Zi-O is Sougo's future self, Oma Zi-O will be erased from existence if Sougo's Ziku Driver is destroyed, and will stay erased until Sougo receives a new one.Forever King 2018 Granted, Oma Zi-O will also vanish from existence if Sougo dies as well.


Kamen Rider Zi-O


"Rider Time! (Electronic beat) Kamen Rider Zi-O![4]"
―Transformation announcement[src]

Rider Statistics

  • Rider Height: 200.0 cm.
  • Rider Weight: 92.0 kg.

Ability Parameters

  • Punching Power: 8.2 t.
  • Kicking Power: 19.0 t.
  • Maximum Jump Height: 30.2 m.
  • Maximum Running Speed: 100 m. per 5.0 sec.

Sougo transforms into Kamen Rider Zi-O (仮面ライダージオウ Kamen Raidā Jiō) by inserting the Zi-O Ridewatch into the D '9 Slot on the Ziku-Driver. His base form's visor reads "Rider" (ライダー Raidā), while the logo on his forehead reads "Kamen" (カメン) in katakana. Zi-O's personal weapon in his base form is the Zikan Girade.

Zi-O consists of the following parts:

  • Caliber A (キャリバーA Kyaribā A) - Zi-O's helmet. 'A' stands for Analog.
    • Clock Blade A (クロックブレードA Kurokku Burēdo A) - The clock hands on the Caliber A. It is a data collection device. The long hand, Baryon Hand M (Barion Hando M バリオンハンドM) predicts temporal information, such as enemy timing, while the short hand, Meson Hand H (メソンハンドH Meson Hando H) measures spatial information, such as the distance between Zi-O and the enemy as well as landing points of finishers.
    • Ow Signal (オウシグナル Ou Shigunaru) - The circular section where the two Clock Blades meet. It feeds gathered information to Zi-O, derive optimum solution to problems, and adjust internal systems of Zi-O.
    • Indication Eye (インジケーションアイ Injikēshon Ai) - The visor which spells out "Rider". Sensors with a 270° viewing angle is built into the compound eye.
    • Kamen Dial (カメンダイアル Kamen Daiaru, lit. 'Mask Dial') - Zi-O's faceplate. It invokes an analog clock face, and is made using a multilayer structure composed of the special metal alloy Graphenium (グラフェニウム Gurafeniumu). The Kamen Dial is described by the TV Asahi website to have a beautiful white lustre finish.
    • Crash Bezel (クラッシュベゼル Kurasshu Bezeru) - The metal frame surrounding the face. It is composed of Graphenium.
    • Core Ryūzu (コアリューズ Koa Ryūzu, lit. 'Core Crown') - The 'button' on Zi-O's left cheek. It is an information management unit that stores combat data.
  • Oval Light Tecter (オーバルライトテクター Ōbaru Raito Tekutā) - Zi-O's shoulder and chest armor. A metal coating called Graphenium Coat (グラフェニウムコート Gurafeniumu Kōto) has been applied, raising durability. As a result, the Oval Light Tecter is not only lightweight, but is also 200 times stronger than steel.
  • Mid Band Liner M (ミッドバンドライナーM Middo Bando Rainā M) - The silver band that runs vertically across Zi-O's torso, it connects the Ziku Driver to the head, converting energy made by the Driver into bioenergy.
  • Time Rush Arm (タイムラッシュアーム Taimu Rasshu Āmu) - Zi-O's arms. Nanoscopic "Nanotube Muscle" (ナノチューブ筋 Nanochūbu-kin) tubing covers it, increasing strength.
  • Flex Arm Girder (フレックスアームガーダー Furekkusu Āmu Gādā) - Zi-O's forearm armor. It is composed of the shock-absorbant material Amsein (アムセイン Amusein), allowing it to absorb and disperse physical attacks with ease.
  • Zi-O Leap Hand (ジオウリープハンド Jio Rīpu Hando) - Zi-O's hand units. It is covered with the purple metal Graphenium Bite (グラフェニウムバイト Gurafeniumu Baito) units, raising destructive power of punches.
  • Adjustrike Suit (アジャストライクスーツ Ajasutoraiku Sūtsu) - Zi-O's bodysuit. It automatically repairs minor damage.
  • Time Rush Leg (タイムラッシュレッグ Taimu Rasshu Reggu) - Zi-O's legs. Nanoscopic "Nanotube Muscle" (ナノチューブ筋 Nanochūbu-kin) tubing covers it, increasing strength.
  • Counter Pad (カウンターパド Kauntā Pado) - Zi-O's kneepads. It reads combat data on the field and sends it to the helmet.
  • Flex Leg Girder (フレックスレッグガーダー Furekkusu Reggu Gādā) - Zi-O's shin protecters. It is composed of the shock-absorbant material Amsein, allowing it to absorb and disperse physical attacks with ease.
  • Zi-O Leap Shoes (ジオウリープシューズ Jio Rīpu Shūzu) - Zi-O's shoes. The tip is covered with the Graphenium Bite (グラフェニウムバイト Gurafeniumu Baito) units, increasing destructive power of kicks. Additionally, The katakana for the word "Kick" (キック) in engraved on the soles.

Appearances: Zi-O Episode 17

Kamen Rider Oma Zi-O
KRZiO-Oma Zi-O

Oma Zi-O

Kamen Rider Oma Zi-O (仮面ライダーオーマジオウ Kamen Raidā Ōma Jiō), or simply Oma Zi-O, is the final form of Sougo in a dystopian future. His visor reads "Rider" (ライダー Raidā), while the logo on his forehead reads "Kamen" (カメン) in katakana. Sougo obtained this form on the event of Oma's Day, gaining control over the Dai Mazines and obtaining power of all Kamen Riders known to exist till date.

Compared to all of other forms of Zi-O, Oma Zi-O's skills are far beyond anything seen so far in the series. In addition to that, though Zi-O (2018-19), Geiz, And Woz need to use Ridewatches in their Drivers and weapons for using Legend/Future Rider powers, Oma Zi-O can simply use them either through his will or by activating the respective Ridewatches.

Appearances: Zi-O Episodes 1, 15-16, 30, 40-41, Kamen Rider Zi-O: Over Quartzer


  • Ziku-Driver - Transformation device. Oma Zi-O possesses a gold-colored and possibly modified variant of it.
  • Ridewatch Holder - Oma Zi-O possesses a gold-colored variant of this.
  • Ridewatches - Transformation trinkets. He was in possession of at least the Ghost and Drive Ridewatches before being stolen by Geiz. He currently is seen to be in possession of the Kuuga, Kiva, and Ryuki Ridewatches (of his time).

Behind The Scenes


Being the future counterpart of Sougo Tokiwa, he is portrayed by an uncredited actor. As Oma Zi-O, he is voiced by Rikiya Koyama (小山 力也 Koyama Rikiya), who also voiced the Ziku-Driver. His suit actor is Seiji Takaiwa (高岩 成二 Takaiwa Seiji)[5] and Yasuhiko Imai (今井 靖彦 Imai Yasuhiko) early in the series.


The "Oma" in his name refers to Ōmagatoki (逢魔時 lit. "The hour of meeting evil spirits") in Japanese mythology and also a reversed spelling of Demon King (魔王(マオー) Ma Ō).


Oma Zi-O mask closeup

A close-up of Oma Zi-O's mask.

  • In addition to his eyes being shaped like the word "Rider" (ライダー Raidā) in katakana, a trait shared with the present Zi-O, Oma Zi-O's mask is also filled with a pattern comprising the kanji for "King" ( Ō), further symbolizing his nature as the Demon King.
    • Furthermore, his katakana visor is also altered to be shaped like an eagle.
      • The eagle shape of his visor might be a reference to the logo of the first Kamen Rider's first enemy Shocker.
  • The Rider's background takes elements from past dark counterparts:
    • A future ruler like Kamen Rider Dark Kiva, but more evil like the original Dark Kiva.
    • A supposedly predestined fate as a destructive force like Kamen Rider Decade.
    • Appears as a more regal version of the main Rider like Kamen Rider Cronus with Ex-Aid (and Genm as well, due to him being a recolor of Ex-Aid).
    • Being a 'Dark Rider' counterpart of the original titular Rider, Oma Zi-O happens to share the same color schemes as another villainous red-eyed golden Rider before him, Kamen Rider Gold Drive.
    • Oma Zi-O's rider design is similar to Kamen Rider Sorcerer. Both of their names (オーマ (Ōma)) are being shared and also both are tyrants who killed many victims (Citizens of Magic Land for Orma and Resistance fighters for Zi-O).
    • Being an evil version of Zi-O who is from the future is similar to Kamen Rider Dark Drive who is also from the future.
    • He is also his voice actor’s third evil Rider role since both Kamen Rider Bujin Gaim and Kamen Rider Dark Drive.
      • Unlike the previous two, Oma Zi-O is the first one to be a series Rider instead of a Movie-exclusive Rider.
    • Like Kamen Rider Evol, Oma Zi-O's voice actor also voiced the character and the driver.
    • Oma Zi-O's shoulder pads bear resemblance to the 'wings' of the Mirror World entity, Odin, along with his Contract Monster, Goldphoenix.
  • As Oma Zi-O is considered a darker, regal version of Zi-O, it is appropriate that the armor further emphasizes the watch-based elements, with said devices being used as accents on the helmet, trophies on the chest, with a gold watch strap as a bandolier and a large set of hour and minute hands on the back arranged like a cape.
    • While currently coincidental, Zi-O II's armor appears like a distorted fusion of both the original form of Zi-O and Oma Zi-O. Zi-O Trinity, too, has torso design similar to that of Oma Zi-O.
  • Oma Zi-O's ability to use past Riders' powers from their Ridewatches is similar to the usage of Fullbottles outside of the suit by the Riders from the previous season.
  • Oddly, Sougo's future self's Driver seems to lack slots to insert a Ridewatch. Given that he is capable of using past Riders' powers by simply activating their Ridewatches, it's possible Oma Zi-O no longer needs to insert a Ridewatch into the Driver to transform.


See Also


  3. Toei Hero Max Vol. 58
  4. Cite error: Invalid <ref> tag; no text was provided for refs named LegendArmorHenshin
  5. Uchusen Vol. 163
Sougo Tokiwa (future, Mirror World) - Geiz Myokoin - Woz (black, white)
Future Kamen Riders
2022: Rentaro Kagura - Isamichi Konjo
2040: Mondo Douan
2121: Rento Makina
Rider Time Ryuki Riders
Ishihashi - Tozuka - Kimura - Ishida - Abyss - Odin
Other Riders
G3 Team - Shun Kageyama (Worm)
Movie-exclusive Riders
Barlckxs - Kagen - Jogen
Ziku-Driver - Ridewatches - BeyonDriver - Mirai Driver (Shinobi, Hattari, Quiz, Kikai, Ginga) - Zikan Girade - Zikan Zax - Ride HeiSaber - Zikan Despear - Saikyo Girade - Zikan Jaclaw - Faizphone X - Taka Watchroid - Kodama Suika Arms - Ride Striker - Time Mazine - Kurogane Oogama - Unnamed Giant Wasp Mecha - Neo Decadriver - Neo Diendriver
Rider Armors - Ridewatch Holder - Oma Advent Calendar - Future Note - Time Break/Burst
9 5 DO: Geiz Myoukouin - Tsukuyomi - Junichiro Tokiwa
Futaros - Ataru Hisanaga - Shingo Hisanaga - Iroha Kagura - Master Gamano - Sara - Ms. Sailor - Oda Nobunaga - Clara Steinbelt
Resistance: Resistance Captain
Agito: Shouichi Tsugami - Takahiro Omuro
Ryuki: Shinji Kido - Dark Shinji - Ren Akiyama - Takeshi Asakura - Miyuki Tezuka - Jun Shibaura - Goro Yura - Kamen Rider Odin
555: Takumi Inui - Masato Kusaka
Blade: Kazuma Kenzaki - Hajime Aikawa
Hibiki: Tomizo Todayama - Kyosuke Kiriya
Kabuto: Arata Kagami - Sou Yaguruma
Den-O: Ryotaro Nogami - Yuto Sakurai
Kiva: Jiro
Decade: Tsukasa Kadoya - Daiki Kaito
W: Katsumi Daido
OOO: Eiji Hino - Michal Minato
Fourze: Gentaro Kisaragi
Wizard: Haruto Soma - Kosuke Nitoh
Gaim: Kouta Kazuraba - Kaito Kumon
Drive: Go Shijima
Ghost: Takeru Tenkuji - Makoto Fukami
Ex-Aid: Emu Hojo - Hiiro Kagami - Kuroto Dan
Build: Sento Kiryu - Ryuga Banjo - Kazumi Sawatari - Gentoku Himuro
Chuta Ohsugi - Daita Kondou - Chikao Nezu - Hina Izumi - Shibuya Hachioji - Narita Kisarazu - Misora Isurugi - Master of Fumen - Owner - Momotaros - Urataros - Kintaros - Ryutaros - Daisuke Okubo - Amane Kurihara - Mana Kazaya - Riki - Ramon - Deneb - Krim Steinbelt
Swartz - Heure - Ora
Movie Exclusive
Barlckxs - Kagen - Jogen - Woz
Another Build - Another Ex-Aid - Another Fourze - Another Faiz - Another Wizard - Another OOO - Another Gaim - Another Den-O - Another Double - Another Kuuga - Another Ghost - Another Shinobi - Another Quiz - Another Ryuga - Another Kikai - Another Zi-O - Another Ryuki - Another Blade - Another Agito (troops) - Another Hibiki - Another Kiva - Another Kabuto - Another Drive - Another Decade
Other Villains
Kasshin - Humanoise - Yaminin - Dustards - Worms
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