This article is about a/an Greeed-like entity/rider in Kamen Rider Fourze and Kamen Rider OOO.
"Do not beg for your life, it is a waste of time."
―Poseidon's boastful words[src]

Poseidon (ポセイドン) was a Greeed who possessed Michal Minato and became Kamen Rider Poseidon (仮面ライダーポセイドン Kamen Raidā Poseidon) and is the movie-exclusive Rider who appeared in the OOO section of the Movie War Mega Max film.


Movie War Mega Max


Kamen Rider Poseidon about to kill Eiji before Michal takes control.

Poseidon is a Greeed formed from the Cell Medals and Core Medals within Michal's body, turning him evil 40 years into the future. As Michal, he is given three Core Medals and the Poseidon Driver which he receives from the remnants of the Kougami Foundation in his time. He then becomes able to transform into Kamen Rider Poseidon. He then arrives to the present time in Michal's body to eliminate all Kamen Riders. The Kamen Rider Poseidon entity is eventually split from Michal's body in his Kamen Rider Poseidon form.

However, the mysterious Kamen Rider appears and knocks him out as Akira Date arrives and becomes Kamen Rider Birth Prototype to fight the enemy before Shintaro arrives and joins the fight as Kamen Rider Birth. The two Kamen Rider Births are easily overpowered with Date's Birth Driver damaged beyond repair,later Eiji reveals that the Kamen Rider may not be acting of his free will due to the Core Medals inside him.

As Eiji learns that his name is Michal Minato, the youth reveals himself to be the Kamen Rider for 40 years in the future. However, his fear of water made him unable to use the Kamen Rider Aqua system he was granted and he instead uses a Core Medal system created by Kougami to become Kamen Rider Poseidon. Unfortunately, the Core Medals and remains of Kiyoto Maki emerge from a manifested black hole and enter Michal's body, giving Kamen Rider Poseidon a will of his own. Waiting Kamen Rider Poseidon out, Ankh attempts to rip the Core Medals out from the Kamen Rider before the entity leaves Michal's body and decides to fight the Kamen Riders in another time period

Oceanic Break

Aqua defeats Poseidon with Oceanic Break.

Arriving at the location of the time hole just as Kamen Rider Poseidon is about to leave, as Ankh holds some Waste Yummy off, Eiji becomes Kamen Rider OOO to fight Kamen Rider Poseidon with Date, Shintaro, and Satonaka providing back up. Managing to face his phobia of water, Michal joins the fight as Kamen Rider Aqua to face Poseidon on the water before taking their battle to the land. Assuming Tajadol Combo, Kamen Riders OOO Tajadol Combo's and Aqua Oceanic Break,combine their signature attacks to destroy Kamen Rider Poseidon. After Kamen Rider Aqua leaves, Ankh is no where to be seen as Eiji reveals to Hina that Ankh actually came from the future, giving him hope that he will somehow revive their friend. However, the two are caught off guard by an explosion as Kannagi to transform into the Super GingaOh.

S.I.C. Hero Saga

The Sorcerer's Apprentice

Kamen Rider Drive

Type HIGH SPEED! The True Power! Type High Speed is Born!


Kamen Rider Poseidon in Tevile-Kun

Kamen Rider Rider Poseidon make a appearance with other Riders and kaijin monsters,when Shinnosuke and Kiriko discover the knock-off versions of the Televi-Kun ,an abandoned warehouse after they meet Roidmude 027

Kamen Rider Brain

Evil Riders in Dream KR Brain

Kamen Rider Poseidon becomes a member of Mu and fighting Kamen Rider Brain in Brain's dream,is killed when Brain uses Toxigenesis, crosses his chest with his hand, dying instantly, while Brain continues to defeat the rest of evil Kamen Riders. Kamen Rider Drive Saga: Kamen Rider Brain

Video Game appearances

Super Hero Generations


Kamen Rider Poseidon is a boss with others villians of Neo-Heisei era in the Video game.

Kamen Rider Battle Ganbaride


Kamen Rider Poseidon card

Kamen Rider Poseidon appears as a playable character in this video game Kamen Rider Battle Ganbaride.

Kamen Rider Buttobasoul

Kamen Rider Poseidon is a playable character in Kamen Rider Buttobasoul.


Kamen Rider Poseidon medal


Powers and Abilities

  • Possession:: Poseidon as entity is able to possess Michael in the film.
  • Superhuman resistance : Poseidon is able to resist strong attacks and machine gun bullets as seen in the movie.
  • Waste Yummies: Poseidon is able to summoned Waste Yummies to serve him as he appeared in 2011 to wreck havoc and destroy Kamen Rider OOO and Birth

Kamen Rider Poseidon

HD KR Poseidon

Kamen Rider Poseidon

"Same, Kujira, Ookamiuo!"
―Transformation announcement[src]
  • Height: 204cm[1]
  • Weight: 89kg[1]
  • Punching Power: 3.5 t.[1]
  • Kicking Power: 7 t.[1]
  • Maximum Jump Height: 45 m.[1]
  • Maximum Running Speed: 100 m. per 6.1 sec.[1]

Similar to OOO, possessed Michal puts three Core Medals on the Poseidon Driver, and transform into the evil Kamen Rider Poseidon. The chest design have an inverse triangular position, which are arranged in the order of the Same on the right, Kujira on the left, and Ookamiuo below the Same and Kujira, unlike OOO's straight and diagonal arrangement. Kamen Rider Poseidon is designed as the light blue Same Head, the dark blue Kujira Arms with a whale's head on right shoulder and whale's tail on the left shoulder, and the dark red Ookamiuo's legs. Kamen Rider Poseidon uses a crimson spear as weapon.

Kamen Rider Poseidon, is actually the Greeed inside Michal's body. The Greeed overtook Michal's body and arrived to the present. It has the ability to create Waste Yummy, like how Uva did. The Greeed split from Michal, after losing some Core Medals to Eiji and Ankh. He was able to form his own body by using Core Medals and Cell Medals, in the form of Kamen Rider Poseidon. Then, Poseidon has been defeated at the hands of Kamen Rider OOO Tajadol Combo's Providence Drop and Kamen Rider Aqua's Oceanic Break. However, Kamen Rider Poseidon's Core Medals are taken for Kannagi to transform into the Super GingaOh. After Super GingaOh's destruction, Poseidon's Core Medals fells into the Earth and as the location of the medals were unknown.

Appearances: Movie War Mega Max, Type HIGH SPEED! (only Image) and Kamen Rider Brain.





Behind the scenes


Poseidon was voiced by Kenji Hamada (浜田 賢二 Hamada Kenji). His suit actor was Jun Watanabe (渡辺 淳 Watanabe Jun). While possessing Michal Minato, while keeping his voice, he is portrayed by Atsushi Arai (荒井 敦史 Arai Atsushi).


Kamen rider poseidon

Kamen Rider Poseidon Concept Art





See Also

Icon-ooo Kamen Rider OOO
Eiji Hino/King - Akira Date - Shintaro Goto - Kamen Rider Core - Michal Minato - Poseidon - Nobunaga
Kougami Foundation and Allies
Kougami Foundation: Kousei Kougami - Erika Satonaka
Cous Coussier: Hina Izumi - Chiyoko Shiraishi - Shingo Izumi
Greeed: Kiyoto Maki - Uva - Kazari - Gamel - Mezool - Ankh (Lost)
Yummy: Waste Yummies - White Yummy - Kamakiri Yummy - Otoshibumi Yummy - Neko Yummy - Piranha Yummy - Bison Yummy - Same Yummy - Ageha Yummy - Siam-Neko Yummy - Rikugame Yummy - Kabuto Yummy - Kuwagata Yummy - Lion-Kurage Yummy - Batta Yummy - Ei-Sai Yummy - Omu Yummy (Blue, Red) - Ika-Jaguar Yummy - Shachi-Panda Yummy - Kuro Ageha Yummy - Pteranodon Yummy (Male, Female) - Fukuro Yummy - Unicorn Yummy - Uni-Armadillo Yummy - Shamo Yummy - Ankylosaurus Yummy - Hagetaka Yummy - Nue Yummy
Other Characters: Gara - Kamen Rider Fourze - Kamen Rider Double - Kamen Rider Wizard - Kamen Rider Gaim - Kamen Rider Ghost - Kamen Rider Ex-Aid - Kamen Rider Build - Kamen Rider Zi-O - Kamen Rider Geiz
Icon-drive Kamen Rider Drive
Kamen Riders
TV Series:Shinnosuke Tomari - Go Shijima - Chase - Tenjuro Banno - Kamen Rider Mach (Production Model) (Jun Honganji)
Movie/Special/Stageshow-exclusive: Zoruku Tojo - Kyoichiro Kuroi - Kamen Rider 4 - Paradox Roidmude - Heart - Brain
Special Investigation Unit
Shinnosuke Tomari - Kiriko Shijima - Krim Steinbelt - Jun Honganji - Genpachiro Otta - Rinna Sawagami - Kyu Saijo

Unofficial Members: Roidmude 072 - Go Shijima - Chase - Mitsuhide Nira (defected)

Other allies
Akira Hayase - Harley Hendrickson - Kyoichiro Kuroi - Eisuke Tomari - Eiji Tomari - Ninningers - Ryu Terui - Takumi Inui - Yuto Sakurai - Sakuya Tachibana - Kamen Rider Blade - Kamen Rider Chalice - Kamen Rider Leangle
Creator: Tenjuro Banno

Generals: Heart - Brain - Chase (defected) - Medic - Freeze - Krim Steinbelt (copy) - Roidmude 005 - Roidmude 006 - Tornado - Paradox

Minor Advanced Roidmudes: Reaper Legion - Iron Roidmude - Paint Roidmude - Crush Roidmude - Scooper Roidmude - Volt Roidmude - Gunman Roidmude - Voice Roidmude - Judge Roidmude - Shoot Roidmude - Shocker Buruburu - Angel Roidmude

Fusion Evolution State: Sword Roidmude - Seeker Roidmude - Open Roidmude - Cook Roidmude - Thief Roidmude

Unofficial: Mitsuhide Nira - Sigma Circular

Other villains
Zoruku Tojo - Imitation Drive - Kibaoni Army Corps - Shocker - Neo Shade - Ganma (Da Vinci Gamma)
Mu:Leader of Mu
Executive :Shocker Leader III
Kamen Riders :Kamen Rider Dark Kiva - Kamen Rider Poseidon - Kamen Rider Wiseman - Kamen Rider Duke - Kamen Rider Dark Ghost - Kamen Rider Another Para-DX
Monsters :Cancer Zodiarts - Gremlin - Demushu - Gamma Superior - Graphite
Community content is available under CC-BY-SA unless otherwise noted.