This article is about a/an rider in Kamen Rider Fourze and Kamen Rider OOO.
Kamen Rider Aqua
Kamen Rider Poseidon
Michal Minato
Gender: Male
Series: Kamen Rider OOO
Motif: Water (Aqua)
Shark, Whale, Wolffish, Water (Poseidon)
Rider Type: Hero (As Aqua),
Villain (Possessed by Poseidon)
Homeworld: Earth (Main Timeline Continuity)
First Appearance: Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max
Last Appearance: Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max
Number of Episode
1 (Movie)
Actor: Atsushi Arai
Kamen Rider Aqua
Kamen Rider Poseidon
HD KR Aqua
For the original Kamen Rider Poseidon, see Poseidon.

Michal Minato (湊 ミハル Minato Miharu?) is a Kamen Rider from the future who originally became the heroic Kamen Rider Aqua (仮面ライダーアクア Kamen Raidā Akua?) and later Kamen Rider Poseidon (仮面ライダーポセイドン Kamen Raidā Poseidon?) whose Core Medals took control of him. He is also the movie-exclusive Rider(s) who appeared in the OOO section of the Movie War Mega Max film.


Michal is a Kamen Rider from 40 years in the future. At an unknown time he gained the Aqua Driver and the Aqua Miraider to fight monsters that appeared in his time. Michal is timid and feels he is too weak to be a Rider in the first place. He ironically couldn't be Aqua at first because he was afraid of water. Receiving the Poseidon Driver from the Kosei Kougami, Kougami believes that the Poseidon Driver can help Michal overcome his timidness and fear, and grant him more power. However this proved futile, and even as Poseidon, Michal couldn't win against the creatures of his time, lost, and Michal was knocked out of transformation. However, just as he was about to give up, the black hole that was created by Kiyoto Maki's death appears, and the Core Medals and Cell Medals from the past entered his body, resulting in a Greeed forming inside the Poseidon Medals. This new Greeed develops an intense desire to fight, and Michal is almost instantly overwhelmed by the new being. With Michal's personality subdued, Kamen Rider Poseidon fights in their home time period for a brief while, but after a time anomaly forms as a result of a meteor containing SOLU crashing into the ocean in the present day, the Poseidon entity sees it's chance and dives through, heading off to fight the Kamen Riders of the past.

It arrives in the era of Kamen Rider OOO, and easily overwhelms a small troop of Kougami's shoulders, but is quickly intercepted by Ankh and Eiji Hino, who take some of his Cores in order to fight back. Poseidon flees to recuperate. Without the extra Cores to stabilize him, Michal is gaining control. Eiji confronts the dark Rider, and suppresses the Greeed's personality, but it soon resurfaces. After Kamen Rider Poseidon loses more of the Core Medals in his body to Eiji and Ankh, the Greeed splits apart with Michal, gaining his own body in the form of Kamen Rider Poseidon. Michal profusely apologizes to Eiji and Ankh, telling his story to the two to Ankh's amusement. But Eiji tells him the true meaning of being a Kamen Rider, having the courage to see tomorrow no matter what it may bring. Just as the battle with Poseidon seems bleak, Michal arrives on his Aqua Miraider, and realizes that what he needed was not power, but courage, and transforms into the heroic Kamen Rider Aqua. He turns the tides quickly, and uses his Oceanic Break together with OOOs' Prominence Drop to finish Poseidon off. He thanks OOO for all he has done for him, then leaps through the time anomaly on the Aqua Miraider, to protect his time as a Kamen Rider.

During the final battle against Kannagi's forces, he returns to the present and gives Eiji the Super Core Medals. He then dashes off to aid the Seven Legendary Riders in battle, going up against the Greeed Kazari.

Rider PowersEdit

Kamen rider aqua

Kamen Rider Aqua

Kamen Rider Aqua

  • Height: 198cm
  • Weight: 80kg
  • Punching Power: 5.8t
  • Kicking Power: 18t
  • Maximum Jump Height: 80m
  • Maximum Running Speed: 100m/5.8s
  • Finishers: Oceanic Break, Aqua Vortex

Aqua, unlike Poseidon, does not use Core Medals, but water as energy to transform. Through the Aqua Driver, a Driver that absorbs water from the surrounding environment to produce a substance called Manas Aqua, Michal transforms into Kamen Rider Aqua. Compared to to Poseidon who uses brute force in most of his attacks, Aqua utilizes Tai Ch'i Quan in his fighting style. His Rider Kicks are the Oceanic Break slide kick and the Aqua Vortex flying roundhouse kick.


Aqua Driver The Aqua Driver is Aqua's transformation belt. To transform, Michal activates the belt to absorb water from the surrounding environment to produce a special liquid called Manas Aqua that circulates and increases the user's abilities to a great deal. The water can be from bodies of water to the water molecules in the air.

Aqua Miraider

  • Length: 2210mm
  • Width: 700mm
  • Height: 680mm
  • Weight: 155kg
  • Fastest speed (on water): 108 knots

Unlike the Kamen Riders of the past, instead of a motorcycle, Aqua's Rider Machine is a jet ski called the Aqua Miraider. However, technology from the future allows it to go on land and soar in the air. Miraider is a portmanteau of Mirai (which means Future) and Rider.


Kamen Rider Poseidon

"Same, Kujira, Ookamiuo!"
―Transformation announcement[src]

Kamen Rider Aqua

  • Height: 204cm
  • Weight: 89kg
  • Punching Power: 3.5t
  • Kicking Power: 7t
  • Maximum Jump Height: 45m
  • Maximum Running Speed: 100m/6.1s

Similar to OOO, 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 vertical (on his chest) and diagonal (on his Driver) arrangement. Kamen Rider Poseidon is designed with 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 an extended spear, the Deepest Harpoon as his weapon.

Kamen Rider Poseidon is actually a Greeed inside Michal's body. The Greeed overtook Michal's body and arrived in the present. It has the ability to create Waste Yummy, similar to 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 using Core Medals and Cell Medals, in the form of Kamen Rider Poseidon. Soon after, Poseiden was defeated at the hands of Kamen Rider OOO Tajadol Combo's Prominence Drop and Kamen Rider Aqua's Oceanic Break. However, Kamen Rider Poseidon's Core Medals are taken for Lem Kannagi to transform into the Super Galaxy King.

Poseidon Driver Just like OOO, the Poseidon Driver also utilizes Core Medals. Poseiden's is somewhat simpler-looking, shaped in a circle with outer design. Unlike the way OOO arranges his Core Medals to transform, Poseidon had his Core Medals put in an inverse triangular position on the Driver rather than being diagonal, like OOO's. It does not require a scanner like OOO does.

The Deepest Harpoon (ディーペストハープーン Dīpesuto Hāpūn?) is an large crimson harpoon which serves as Poseidon's primary weapon.

Core Medals Just like OOO, Poseidon uses three marine life-themed Core Medals (コアメダル Koa Medaru?). But unlike OOO's Core Medals, these three Core Medals that Poseidon have are created by Kougami Foundation by Kosei Kougami, as well as the fact that one of the Cores does not match the same color as the other two. These three Core Medals does not belong to any of the Greeeds, and it is only used to be utilized in the Poseidon Driver to transform into Kamen Rider Poseidon.


  • Same Medal (サメメダル Same Medaru?): The light blue Shark Medal, enabling Poseidon to use the Same Head.


  • Kujira Medal (クジラメダル Kujira Medaru?): The dark blue Whale Medal, enabling Poseidon to use Kujira Arms, it also gives Poseidon a whale shoulder design.


  • Ookamiuo Medal (オオカミウオメダル Ōkamiuo Medaru?): The dark red Wolffish Medal, enabling Poseidon to use Ookamiuo Legs.

Gallery EquipmentEdit



Michal Minato was portrayed by Atsushi Arai (荒井 敦史 Arai Atsushi?). As Kamen Rider Aqua, his suit actor was Eitoku (永徳?) while his suit actor as Kamen Rider Poseidon was Jun Watanabe (渡辺 淳 Watanabe Jun?).

Behind the scenesEdit

  • Aqua is designed to resemble Kamen Riders #1 and #2, but powered by water instead of wind.
  • Aqua's use of a Jet Ski and water theme could possibly be an homage to Sea Jetter Kaito, a super hero from a theme park show in Ishinomaki, which is also home to the Ishinomori Manga Museum.
  • Michal is the second Rider who has no fighting spirit at first until being encouraged by his mentor (Eiji), then casts away a good Rider form and assumes an evil one due to possession by an evil spirit from another time period, and eventually involves himself in defeating that spirit. The first is Ryotaro Nogami.
  • Another rider in Kamen Rider Gaim, Yoko Minato, shares the same surname as Michal. However their relationship is not known.

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