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Icon-kr.pngThis article is about a multiverse in the Kamen Rider Series.

Multiverse as seen in Kamen Rider Heisei Generations Forever

Within the franchise, Kamen Riders exist within the multiverse in several different Alternate Reality Worlds, or simply A.R. Worlds (A.R.WORLD, Ei.Ā. Wārudo) though referred as "World" (世界, Sekai) individually.

Concept

The concept of the Multiverse refers to the existence of countless parallel universes that comprise of all that exists. According to Tsukasa Kadoya, the overseer of these worlds, he claims that every single Rider exists on their own separate plane, with Sougo Tokiwa himself being the only one capable of either uniting them or keeping them separate.

The worlds are usually are inline in both date and time Kamen Rider Decade, though there will be differences here and there in terms of the time flow. Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders.

List of Known Worlds

Original Worlds

The following are the individual worlds in which each Kamen Rider series take place in. During the Kamen Rider franchise's revival in the 2000s, each season were originally standalone and took place in their own worlds. However, from the start of the Heisei Era's second phase, these previously unrelated works were put together into a single, shared continuity, with Kamen Rider Zi-O ending with the twenty Heisei Riders all back in their own universes.


Worlds Description
Showa Series Universe The universe where the original Showa Era series and 90s movies (Shin, ZO, J) takes place.
Kamen Rider Kuuga Universe The universe where Kamen Rider Kuuga takes place. Yusuke Godai engages against the Gurongi as "Kuuga", also referred as Unidentified Lifeform #4 by the public.
Kamen Rider Agito Universe The universe where Kamen Rider Agito takes place. Shouichi Tsugami transforms into a powerful superhuman, Agito, whenever in the presence of the Lords.
Kamen Rider Ryuki Universe The universe where Kamen Rider Ryuki takes place. In this world, Kamen Riders are participants of the Battle Fight, where they battle each other in the Mirror World plane until only one of them survives.
Kamen Rider 555 Universe The universe where Kamen Rider 555 takes place. In this world, the Kamen Riders were originally created to further the Orphnochs' agenda to overrule humanity, only to be taken by a select few who chose to fight against them.
Kamen Rider Blade Universe The universe where Kamen Rider Blade takes place. In this world, Kamen Riders are the designation for BOARD's defense against the Undead by using the Rouze Cards.
Kamen Rider Hibiki Universe The universe where Kamen Rider Hibiki takes place. In this world, the Kamen Riders are known as "Oni", former humans that transform into demons to fight against the Makamou.
Kamen Rider Kabuto Universe The universe where Kamen Rider Kabuto takes place. In this world, the Masked Rider System are the defense against the Worms and chosen canadites must be accepted by the Zecters.
World of Den-O (電王の世界, Den'ō no Sekai) The universe where Kamen Rider Den-O takes place. In this world, Ryotaro Nogami and the Taros protect the timestream from malevolent Imagin as Den-O.
Kamen Rider Kiva Universe The universe where Kamen Rider Kiva takes place. In this world, Wataru Kurenai is destined as Kiva to fight the life-draining monsters called Fangires.
Kamen Rider W Universe The universe where Kamen Rider W takes place. In this world, Kamen Riders are the protectors of Futo using the Gaia Memories and drivers created by Shroud against the Dopants.
Kamen Rider OOO Universe The universe where Kamen Rider OOO takes place. In this world, Eiji Hino engages against the Greeed as Kamen Rider OOO.
Kamen Rider Fourze Universe The universe where Kamen Rider Fourze takes place. In this world, Kamen Riders are an urban legend who fight in the darkness to protect humanity.
Kamen Rider Wizard Universe The universe where Kamen Rider Wizard takes place. In this world, Kamen Riders are known as "Magicians" who can perform magic and have fought against the Phantoms.
Kamen Rider Gaim Universe The universe where Kamen Rider Gaim takes place. In this world, Kamen Riders are known as "Armored Riders" by transforming with the Lockseeds.
Kamen Rider Drive Universe The universe where Kamen Rider Drive takes place. In this world, Kamen Riders are created from Krim Steinbelt's Core Drivar technology and the advisaries of the Roidmudes.
Kamen Rider Ghost Universe The universe where Kamen Rider Ghost takes place. In this world, Kamen Riders are created by Edith to fight against the malevolent Gamma and collect the 15 Heroes Eyecons.
World of Ex-Aid (エグゼイドの世界, Eguzeido no Sekai) The universe where Kamen Rider Ex-Aid takes place. In this world, the Kamen Riders access the powers of the Gashats to fight against Bugster-related threats.
World of Build (ビルドの世界, Birudo no Sekai)/World A The universe where Kamen Rider Build takes place. In this world, Sky Wall has split Japan into three nations and the Kamen Riders are Japan's force for justice against various war-related threats.
World of Zi-O (ジオウの世界, Jiō no Sekai) The universe where Kamen Rider Zi-O takes place. In this world, there was the center of convergence with the previous 19 Heisei Rider worlds to became one united world, before the Earths were reseperated by Ohma Zi-O in the finale.
World of Zero-One (ゼロワンの世界, Zerowan no Sekai) The universe where Kamen Rider Zero-One takes place. In this world, Humagears have become a staple in everyday life and the Kamen Riders are created during the conflict between humans and Humagears.
Kamen Rider Saber Universe The universe where Kamen Rider Saber takes place. In this world, Kamen Riders are the swordsmen wielding the power from the Wonder Ride Books.


Kamen Rider Decade A.R. Worlds

The characters of Kamen Rider Decade exist amongst various different iterations of reality that are based on the previous entries of the Kamen Rider Series that have aired during the Heisei period of Japanese history. Each differs in some way from the series on which it was based.


Worlds Description
World of Natsumi (夏海の世界, Natsumi no Sekai) This world is the homeworld of Natsumi Hikari and where Tsukasa Kadoya ended up having lost his memory. It was the center of the collapse of the multiverse as the Nine Worlds converged, causing hordes of monsters to come through the dimensional walls to destroy the world.
World of Kuuga (クウガの世界, Kūga no Sekai) This world is an alternate version of events based on Kamen Rider Kuuga. It was the world where Yuusuke Onodera originated from before he joined Tsukasa in his journey.
World of Kiva (キバの世界, Kiba no Sekai) This world is an alternate version of events based on Kamen Rider Kiva. This world allows Fangires and humans to coexist, with the King's servants destroying the rebellious Fangires.
World of Ryuki (龍騎の世界, Ryūki no Sekai) This world is an alternate version of events based on Kamen Rider Ryuki. In this world, the Kamen Rider Trial is a battle where the Kamen Riders fight each other to decide the fate of a defendant in a criminal case.
World of Blade (ブレイドの世界, Bureido no Sekai) This world is an alternate version of events based on Kamen Rider Blade. In this world, the Riders are high rank employees of the BOARD Corporation whose job it is to combat the Undead once receiving clearance to use Rouzers.
World of Faiz (ファイズの世界, Faizu no Sekai) This world is an alternate version of events based on Kamen Rider 555. In this world, students of the Smart Brain High School are being attacked nightly by monsters known as the Orphnoch.
World of Agito (アギトの世界, Agito no Sekai) This world is an alternate version of events based on Kamen Rider Agito. Similar to the World of Kuuga, the Riders and the police battle the Gurongi. However, a new evil surfaces onto the world, monsters that they refer to as the Unknown.
World of Kabuto (カブトの世界, Kabuto no Sekai) This world is an alternate version of events based on Kamen Rider Kabuto. This world's iteration of Kamen Rider Kabuto is trapped traveling at the speed of light yet continues to fight the Worm.
World of Hibiki (響鬼の世界, Hibiki no Sekai) This world is an alternate version of events based on Kamen Rider Hibiki. In this world, humans train to become Oni within one of three rival schools of sound-based martial arts called Ongekidō.
World of Negatives (ネガの世界, Nega no Sekai) This is a parallel world created in the image of Natsumi Hikari's World, but is actually home to monsters who assume human form and serve Dark Riders who hunt down any real humans that are still alive.
World of Diend (ディエンドの世界, Diendo no Sekai) This world is the homeworld of Daiki Kaito and is dominated by the Roaches and their leader Fourteen, the human populace is mostly brainwashed into a state of euphoria.
World of Shinkenger (シンケンジャーの世界, Shinkenjā no Sekai) This is the reality in which the Samurai Sentai Shinkenger, and presumably most of the Super Sentai series, takes place.
World of Black RX (ブラックRXの世界, Burakku Āru Ekkusu no Sekai) This world is an alternate version of events based on Kamen Rider Black RX. It is home to a version of Kohtaro Minami who became Kamen Rider Black RX.
World of Black (ブラックの世界, Burakku no Sekai) This world is an alternate version of events based on Kamen Rider Black. It is home to a version of Kohtaro Minami who remained as Kamen Rider Black.
World of X-Rider (Xライダーの世界, Ekkusu Raidā no Sekai) This world is an alternate version of events based on Kamen Rider X. It is home to an alternate X-Rider who initally vanquished his world's Apollogeist.
World of Amazon (アマゾンの世界, Amazon no Sekai) This world is an alternate version of events based on Kamen Rider Amazon. It is home to a version of Daisuke Yamamoto and by the time Decade arrives, he finds the world is under Dai-Shocker's control as they eliminate any resistance.
World of Decade (ディケイドの世界, Dikeido no Sekai) This world is the homeworld of Tsukasa Kadoya, where he discovers the origin of his powers and his true heritage as the leader of Dai-Shocker.
World of Stronger (ストロンガーの世界, Sutorongā no Sekai) This world is an alternate version of events based on Kamen Rider Stronger.
World of OOO (オーズの世界, Ōzu no Sekai) This world is an alternate version of events based on Kamen Rider OOO.
World of Gaim (鎧武の世界, Gaimu no Sekai) This world is an alternate version of events based on Kamen Rider Gaim.
World of Televi-Kun (てれびくんの世界, Terebikun no Sekai) This world is the setting of the Super Adventure DVD special Kamen Rider Decade: Protect! The World of Televikun. The Hikari Studio visited this world with Decade and Diend fighting Televi Bae-Kun, a member of Dai-Shocker.
World of Net (ネットの世界, Netto no Sekai) This world is the setting of the net movie series Kamen Rider Decade: All Riders Super Spin-off.


Reboot Worlds

The following are the individual worlds where were remade from the original Kamen Rider Series.


Worlds Description
Kamen Rider The First/The Next Universe The universe where Kamen Rider The First and Kamen Rider The Next takes place.
World of Amazons (アマゾンズの世界, Amazonzu no Sekai) The universe where Kamen Rider Amazons takes place.
Kamen Rider Black Sun Universe The universe where Kamen Rider Black Sun takes place.
Shin Kamen Rider Universe The universe where Shin Kamen Rider takes place.


Other Worlds

The following are other worlds in the multiverse beyond Kamen Rider Decade.


Worlds Description
Kamen Rider G Universe The universe where Kamen Rider G takes place. Kamen Rider Decade briefly visits this world to encourage the titular Rider to fight alongside the nine previous Heisei Riders.
Alternate Skull's Universe This world is the homeworld to an alternate Sokichi Narumi, who briefly came out of his world to meet with Shotaro Hidari.
World of Gatakiriba TBA
World of Latorartar TBA
World of Sagohzo TBA
World of Shauta TBA
World of Tajadol TBA
World of Putotyra TBA
World of Burakawani TBA
World of Sengoku Era (戦国時代の世界, Sengoku Jidai no Sekai) This is an alternative world where the country of Japan is divided into 14 territories owned by a military faction that is themed around a main Heisei-era Kamen Rider, known in this world as Bujins, who serve a war lord that resembles a character from their series.
World within the Magic Stone (魔法石の中の世界, Mahōseki no Naka no Sekai)/World of Monsters This world serves as a sort of afterlife for monsters defeated by the Kamen Riders and residents of this world also transform into monsters. It is also referred by Kamen Rider Decade as World of Wizard (ウィザードの世界, Wizādo no Sekai).
World B This world is another Earth without the Sky Wall and ultimately merged with the World of Build to create the New World.
World of Ataru (アタルの世界, Ataru no Sekai)/The Real World This world is the homeworld to Ataru and Shingo Hisanaga. In this world, Kamen Riders are a work of fiction and a center of the conflict against the Super Time Jacker Tid.
World of Swartz (スウォルツの世界, Suworutsu no Sekai) This world is the homeworld to Swartz and Tsukuyomi, who hail from a royal family that governs time and space. Because Kamen Riders do not exist in their world, this world was eventually merged and intergrated with the World of Zi-O.
Robot Sougo Tokiwa's Universe This world is the homeworld to the robot Sougo Tokiwa, where humans are replaced by androids.
Misa Kuon's Universe This world is the homeworld to Misa Kuon.
A.R. Swartz's Universe This world is the homeworld to an A.R. Swartz.
A.R. Heure's Universe This world is the homeworld to an A.R. Heure, who is revealed to be a space ninja.
A.R. Ora's Universe This world is the homeworld to an A.R. Ora.
A.R. Yusuke Onodera's Universe This world is the homeworld to an evil incarnation of Yusuke Onodera.
Decade VS Zi-O's Universe This world is a realm where various individuals across the multiverse are gathered for a mansion death game.
Sougo B's Universe This world is the homeworld to Sougo B, a version of Sougo Tokiwa from Hanazono Academy. This world was among the six worlds that merged into the Zi-O VS Decade Universe. Following True Sougo's defeat, Sougo B and Misa Kuon were integrated into the World of Zi-O, co-existing with that reality's Sougo.
Sougo C's Universe This world is the homeworld to Sougo C, a version of Sougo Tokiwa from Misawa High School. This world was among the six worlds that merged into the Zi-O VS Decade Universe.
Sougo D's Universe This world is the homeworld to Sougo D, a version of Sougo Tokiwa from Hitachi Academy. This world was among the six worlds that merged into the Zi-O VS Decade Universe.
Sougo E's Universe This world is the homeworld to Sougo E, a version of Sougo Tokiwa from Moroi Academy. This world was among the six worlds that merged into the Zi-O VS Decade Universe.
Sougo F's Universe This world is the homeworld to Sougo F, a version of Sougo Tokiwa who was eliminated by Kamen Rider Decade. This world was among the six worlds that merged into the Zi-O VS Decade Universe.


Merged Worlds

The following are worlds in the multiverse that have merged into one unified Earth, some have split back into different worlds after the crisis was averted.


Worlds Description
World of the Rider War (ライダー大戦の世界, Raidā Taisen no Sekai) This world is the iteration of reality where the Rider War takes place and is the reality that is the confluence of the Nine Worlds.
World of Five Colors (5色の世界, 5-Shoku no Sekai) This world is merged from the World of OOO and the World of Gaim.
New World (新世, Shin Sekai) This world is merged from the World of Build (World A) and a world without Evolto (World B).
World of Kamen Rider (仮面ライダーの世界, Kamen Raidā no Sekai) This world is merged from all 20 Heisei Riders' main worlds from Kuuga through Zi-O. It is unknown what should be the corresponding world for Decade as he still claiming himself not belonging to this world after the merger, although one possibility might be the World of Decade.
Zi-O VS Decade Universe This world is a merger of the timelines of six A.R. variations of Sougo Tokiwa by True Sougo.


Subdimensions

In the metaseries, there exists worlds that exist on a different dimensional plane, and interact within the continuity of the real world.

Worlds Description
Dream Worlds These are worlds that can be visited via dreaming.
Mirror World (ミラーワールド, Mirā Wārudo) This realm is a different dimensional plane in which only the Kamen Riders can safely exist and is home to the Mirror Monsters.
Underworld (アンダーワールド, Andāwārudo) These realms are the subconscious of a human. When a Gate gives in to despair, their magic core becomes corrupted and forms into an Inner Phantom, which then emerges and proceeds to tear down the host's Underworld before destroying the host itself.
Game World (ゲーム世界, Gēmu Sekai) These are digital worlds where various game characters from the video games live in.
Wonder World (ワンダーワールド, Wandā Wārudo) This world is a colorful fantasy world, populated not only by humans, but also by different creatures, mechanical God Beasts, Animals and Story Characters.


List of Known Timelines

Alternate Timelines

The following are alternate timelines within the Kamen Rider franchise. The presence of divergent timelines exist within each universe, producing various alternative futures, potential outcomes, and alternate histories.


Worlds Description
13 Riders Timeline A This is an alternate retelling of the Kamen Rider Ryuki main story, where Shinji Kido finds the Ryuki Deck and encounters the Riders through different circumstances. The timeline ends with Shinji facing the surviving Riders on his own.
13 Riders Timeline B This is an alternate retelling of the Kamen Rider Ryuki main story, where Shinji Kido finds the Ryuki Deck and encounters the Riders through different circumstances. The timeline ends with Shinji destroying the Mirror World, only to inadvertently reset the Rider Fight.
Episode Final Timeline This is an alternate timeline of events surrounding the final hours of the Rider Fight, where Kamen Rider Femme & Ryuga become active. The timeline ends with Ryuki and Knight in their Survive Forms facing against the horde of Hydragoons.
Advent Calendar Timeline This is an alternate timeline of events surrounding the final hours of the Rider Fight, where Shinji becomes the victor of the Rider Fight and succeeds to revive all of the victims of the Rider War.
World of If Timeline This is an alternate timeline of events right after Shinji recieves the Survive Card from Shiro Kanzaki. The timeline ends with Kamen Rider Odin becomes victor of the Rider Fight but Kanzaki fails to save Yui.
A New Life Timeline This is a new timeline created by Shiro Kanzaki following the repeated failures of saving Yui, where Shiro rewinds time so that the Mirror Monsters and Kamen Riders never existed in the first place.
Paradise Lost Timeline This is an alternate timeline of events surrounding the Kamen Rider 555 main story in which in Smart Brain and the Orphnochs have accomplished its goal of world domination, while the human race is diminishing to near-extinction.
Missing Ace Timeline This is an alternate timeline of events surronding the sealing of the remaining Undead. Kazuma Kenzaki made the decision to seal Hajime Aikawa and following four years of peace, a new threat arises.
God Speed Love Timeline This is an previous timeline of events surrounding the Kamen Rider Kabuto main story where the meteor that struck Shibuya was much larger than expected and evaporated all of Earth's oceans, plunging the planet into chaos. The timeline was erased after Hyper Kabuto traveled in time to destroy the second meteor with the one in the past, creating the TV Show timeline.
Hana's Timeline This is an alternate future where Hana originally came from, but was erased due to it coming into conflict with Kai's timeline. The timeline eventually began to repair itself due to Hana still in existance, ensuring a chance for her own timeline to continue coming to pass.
Kai and the Imagin's Timeline This is an alternate future where Kai and the Imagins originally came from but came into conflict with Kai's timeline. The surviors of that timeline arrived in Ryotaro's timeline and transformed into Imagin. The timeline was completely eradicated after Hana's timeline was ensured, erasing Kai and most of the Imagins.
World of Possibilities Timeline This is an alternate future where the Helheim Forest has taken over the world and where the Sengoku Rider War took place, being observed by Mai Takatsukasa. According to DJ Sagara, that concorrently depicts the final battle between Gaim and Baron leading their armies of Inves in a battle for the Forbidden Fruit.
Eiji Tomari's Timeline This is an alternate future where the Roidmudes have succeeded in conquering the entire planet as of 2035. Eiji Tomari continues to uphold his father's legacy as the next Kamen Rider Drive, only to be killed and impersonated by the Paradox Roidmude. The timeline was erased after Shinnosuke Tomari and his allies defeated all 108 Roidmudes, averting the hopeless timeline and ensuring his brighter future.
Super Movie Wars Genesis Timeline This is an alternate timeline created by a space-time wormhole that resulted in Takeru Tenkuji and Shinnosuke Tomari travelling to the year 2005, only to come into conflict with the Renaissance Gamma and causing several butterfly effects to the present timeline.
Ohma Zi-O's Timeline This is an alternate future where Sougo Tokiwa became the demon king, Ohma Zi-O, eventually using his powers to wipe out at least 50% of the Earth's population and ruling the world with an iron fist as of 2068. Geiz Myokoin, Tsukuyomi, and Black Woz originated from this timeline.The timeline was erased after the Sougo Tokiwa of 2019 chose to reseperate the Heisei Rider worlds.
GeizRevive's Timeline This is an alternate future where Geiz Myokoin succeeds in defeating Sougo Tokiwa as the savior, GeizRevive. Due to this, new Kamen Riders are able to rise, as such Kamen Rider Shinobi, Quiz, and Kikai. White Woz describes this timeline to be "at peace, like time itself has stopped". The timeline was erased after Geiz chose to befriend Sougo rather than defeat him.
Over Quartzer Timeline This is an alternate timeline of events surrounding the climax of Sougo Tokiwa's path of kingship. Sougo Tokiwa earns the Drive Ridewatch and comes into conflict with the Quartzer, led by his alternate universe counterpart. Instead of becoming Ohma Zi-O like in the TV finale, Sougo becomes Kamen Rider Zi-O OhmaForm.


Altered Timelines

The following are altered timelines within the Kamen Rider franchise. In contrast to the alternate timelines, these periods were revised through means of time travel, creating a vastly separate timeline, and would often be restored back normal according to history.


Worlds Description
Time Vent Timeline This timeline was created when Kamen Rider Odin travelled back in time to reverse the destruction of the Kanzaki siblings' drawings. Shinji Kido was aware of the changes but was unable to perfectly change major tragic events of the Rider War.
Breaking Super Evolution Timelines In the episode, the Cammarus Worm kills Kamen Rider Gatack. Right after Soji Tendo transforms into Kamen Rider Hyper Kabuto, he travels back in time to defeat the Cammarus Worm, sparing Kagami's life.
Onigashima Warship Timeline This is an alternate timeline where the Oni Brothers caused by several altercation in the present and past, causing various time-shifts like Ryotaro Nogami de-aging and Yuto Sakurai ceasing to exist. It was eventally erased after Den-O defeated the Oni Brothers.
Super Trick of the Real Criminal New Timeline This is a revised timeline in the World of Ryuki where Tsukasa Kadoya and Shinji Tatsumi traveled back in time using the Time Vent card to prevent the murder of Reiko Momoi.
Let's Go Kamen Riders Timeline This is an alternate timeline after Ankh dropped a Core Medal right into Shocker's hands, inadvertently causing a sequence of events that resulted in the Double Riders brainwashed into their followers and Shocker conquering most of the world, therefore erasing the existance of Kamen Riders. The timeline slowly erased due to the people's memories of the Kamen Riders came back, restoring the Riders back to the present.
Magic Land (魔法使いの国, Mahōtsukai no Kuni) This is an alternate reality created by Kamen Rider Sorcerer using the Create Ring where magic is used by the residents in their daily lives. After Sorcerer was defeated by Kamen Rider Wizard in Infinity Dragon, the Create Ring's spell was undone and the reality was erased as a result.
Soccer World (サッカーの世界, Sakkā no Sekai) This is an alternate reality created by Lapis where Helheim never came into contact with Earth. Instead of the Beat Rider dance teams competing against each other Inves Games, their alternate counterparts instead play in the All Rider Cup. The Soccer World collapsed when Lapis was allowed to have rest.
Super Hero Taisen GP Timeline This is an alternate timeline created by Shocker using the History Modification Machine to ensure their goal of world domination. Kamen Rider 3 was deployed in February 10th, 1973 and killed Riders 1 & 2 and later Kamen Riders were brainwashed into becoming Shocker Riders. The history was erased after the History Modification Machine was presumably destroyed, seemingly restoring the timeline back to normal.
Kamen Rider 4 Timelines These are alternate time loops as a result of Shocker's continued experiments with the History Modification Machine. These time loops are activated by Takumi Inui's feelings of mourn whenever someone dies, allowing Shocker to grow stronger and stronger and eventually regain their conquest of the world. The timeline was reset after Takumi destroyed the Machine, ensuring a peaceful future for his allies.
Time Jacker's Revised Histories These were the revised histories of Kamen Rider Build, Ex-Aid, Fourze, Faiz, Wizard, OOO, Gaim, and Ghost as a result of the Time Jackers stealing the history and powers from the original Riders to create Another Riders. As a result of the Riders losing their powers and any history of them fighting their respective eneimes are erased, they go on to have peaceful lives as normal civillians. The altered histories were likely restored after Sougo Tokiwa split back the Heisei Rider worlds.
The Another Worlds (アナザーワールド, Anazāwārudo) These are several alternate timelines created by Another Decade which victims would be trapped in a neverending loop of revised past events, therefore reviving the Dark Riders and giving them their second chance at life.
Reiwa The First Generation Timeline This is an alternate timeline where the Ark was launched into space, causing the Humagears to dominate over humanity. It was created after Finis turned Will into Another Zero-One. The timeline was eventually erased after Zi-O and Zero-One destroyed Geiz's Time Machine, which Finis used to travel back in time, therefore eliminating the alternate timeline.
The Third History This is an alternate timeline where the Third Woz hails from. In the World of Zi-O resetted by Sougo Tokiwa, a villainous version of Woz would leave this timeline in order to create a new timeline by awakening Inner Sougo.
The Fourth History This is an alternate timeline created by the Third Woz. The timeline was created once he awakened Inner Sougo, reigning from this timeline as Another Ohma Zi-O.


Behind the scenes

The concept of A.R. Worlds was first introduced in Kamen Rider Decade, which brought the first ten Heisei Riders together for the first time. Whilst the Showa Riders were thought to share a single world, with crossovers between them being fairly common, the Heisei series was much less interconnected.

Starting with Kamen Rider W, several trends were introduced in an effort to bridge multiple seasons together into a single world, including easter eggs, pre-series cameos in movies, as well as the Movie War crossover series. The Kamen Rider series would also begin to crossover with the Super SentaiIcon-crosswiki.png series. Kamen Rider Build would later be the first Rider season to explicitly distinguish itself as occurring in a separate world from the rest of the Rider seasons.

The final Heisei season, Kamen Rider Zi-O, would later establish each of the Heisei Rider seasons as taking place in their own worlds. While this would also be the standard for the Reiwa era going forward, crossovers amongst different seasons would still take place, making the Rider multiverse, and by extension the Toei multiverse, similar to the floating timeline concept in comics — or more aptly, a "floating multiverse", whereby each season mostly takes place in their own world, but they may intersect with one another at several points wherever necessary.

It is to be noted that Toei themselves has not explicitly defined a strict continuity with each of their tokusatsu series.

Notes

  • The multiverse theory is a famous concept explored most often in science-fiction stories, particularly in DC Comics mythology, as well as Marvel Comics, where alternate scenarios are depicted in timelines where historical events played out differently like certain people in history were never born, killed before a major event, or even were born a different gender. It can even depict technologies advancing further or hindering depending on certain historical factors and/or changes to the political spectrum.
    • In terms of real science, it is explained that as an individual makes a decision, there exists another (parallel) universe in which they did not make that decision. While the concept has been debated consistently, several scientists are divided as to whenever the parallel universe theory exists, thus has removed its legitimacy as an actual scientific inquiry.

See also

References

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