Being a Rider is fun.
~ Takeshi Asakura/Kamen Rider Ouja

Takeshi Asakura (also known as Kamen Rider Ouja) is one of the main antagonists in the Japanese TV series Kamen Rider Ryuki, alongside Kamen Rider Odin. Being a psychotic murderer who fights for the pleasure of sheer destruction, he is the first and, if not all, the most evil Kamen Rider of all the 13 Riders in the Rider Fight and in the entire Heisei Era Kamen Rider series.

He was portrayed by Takashi Hagino.


Kamen Rider Ryuki

Arrested for murdering his entire family, save his kid brother, in a fire he caused at the age of 13, Asakura made a name for himself as a sadistic felon with a love to fight, maim and otherwise destroy anything in his random fits of rage. As a result of his sadistic nature, Asakura was personally responsible for both ending the piano career of Yuichi Saito and murdering the older sister of Miho Kirishima. Eventually, his arrogant personality results with his defense attorney, Shuichi Kitaoka refusing to represent him and left him to rot in jail. Wanting to bust out and express his destructive impulses on Kitoaka, Asakura gladly accepted Shiro Kanzaki's offer to join the Rider War and forms a pact with Venosnaker to become Kamen Rider Ohja.

Taking full advantage of the Rider War, wanting to win just to start it up again for his amusement, Asakura learns of Kitaoka's identity as Kamen Rider Zolda and holds his assistant Goro Yura hostage. Though Goro escapes, Ohja gets to fights Zolda and his reinforcements before senselessly killing Kamen Rider Gai, who set the event up, and later claimed his Contact Monster Metalgelas as his own. He later does the same to Miyuki Tezuka, a friend of Yuichi's who became Kamen Rider Raia to end the Rider War, and obtained his Contact Monster Evildiver afterwards. Eventually with help from Ren, Kamen Rider Knight, Takeshi fakes his death so he can participate in the Ride War without police interference. But once publicly revealed to be alive, Asakura was soon later captured, going in and out of jail for several instances. As the Rider War begins to reach its climax, destroying Kamen Rider Imperer's deck so he can fade away in the Mirror World, Asakura engages Zolda in a final showdown. Though he believe him to be Kitaoka, his fatally wounded opponent was actually Goro who took the deceased Kitaoka's place. Denied the chance to kill Kitaoka as he resturns to the real world, Asakura finds himself surrounded by the authorities and the taken out by snipers as he went down fighting.

Kamen Rider Ryuki: Episode Final

In the movie, Episode Final, Asakura was targeted by Miho Kirishima, who became Kamen Rider Femme to hunt him down for revenge. Though she was outmatched by the stronger opponent, Kamen Rider Ryuga's destroying of Genocider reverted Ouja to Blank Form. Weakened, Femme stabbed right at Ouja's blank deck, destroying it. Shortly, Ouja's armor disintegrated and Asakura dissolved in the Mirror World as he attempted to take Miho down with him.

Kamen Rider Decade


Kamen Rider Decade: All Riders vs. Dai-Shocker

Asakura later appears in All Riders VS Dai-Shocker to fight the organization. However due to his sadistic nature he sides with with Dai-Shocker along with Kamen Rider Kickhopper. He attempts to stop Diend and Natsumi only for Kamen Rider Diend to summon Gai, Raia, and PunchHopper to fight him and Yaguruma. He fought Gai and Raia, the two riders he killed in the series. The outcome of the fight is unknown.



Kamen Rider Ex-Aid

Asakura is revived through unknown means, and demands the thing that he calls a "Gashat". The thing in question is the Night of Safari Gashat. Asakura would later start hurting numerous people and beat them to a bloody pulp simply because he longs fighting. And as he confronts Hiiro Kagami, Kamen Rider Brave, he tells his Beast Rider Squad cohorts (Dark Kiva, Sasword, Beast, and Tiger) to stand back, claiming Hiiro to be his prey as he transforms into Kamen Rider Ouja. Throughout the fight, it is revealed that Hiiro and Asakura are polar opposites (while Asakura fights to randomly kill and destroy people for his own happiness, Hiiro fights to save people's lives and make them happy). This prompts Hiiro to transform into Safari Quest Gamer Level 4 via the Night of Safari Gashat and destroy Ouja. Not long after, as Ouja is knocked out of his transformation, Asakura advises Hiiro to keep fighting or die, much to the latter's disapproval.

Rider Time: Ryuki

Takeshi Asakura was one of the 13 Riders summoned to the Mirror World to begin the Rider Fight once more. Becoming Kamen Rider Ouja once more, Asakura was one the one responsible for killing the new Kamen Rider Tiger and later Goro Yura / Kamen Rider Zolda.


Asakura is a sadistic and violent madman to the core, who takes joy in fighting, maiming, killing, or otherwise destroying whatever in his way. He has no sympathy nor remorse for his actions, and will attack anyone who "vexes" him. His malicious and psychopathic traits are so great that he draws the ire of other Riders throughout the Rider Fight; such as his sworn enemy Kitaoka and even the naive and good-hearted Shinji.

Powers and Abilities

Ouja is a melee based Rider like majority of the Kamen Riders. However, he is extremely sadistic, showing no mercy as well as superior tactics over his opponents. He fights relentlessly, but only if he is sure he will win, and isn't hesitant to use other Riders as factors or pawns in his battles. His Sword Vent is his most frequently used weapon. He becomes even more powerful when he forms Contracts with Metalgelas and Evildiver. This allows him access to Gai's Strike Vent and Raia's Swing Vent, making him a more versatile as well as a more deadly force. His Contract Monster Venosnaker participates in his battles, and is often seen as Dragreder's evil equivalent in the series (this has been replaced by Dragblacker).

However, Ouja is not without weaknesses. He's more vulnerable towards long-ranged opponents, his own unstable nature outclasses his fighting potential, he rarely uses his special card Steal Vent (possibly because he is comfortable with his choice of weapon, as well as only using it to disarm Riders, which is an ineffective strategy), and he rarely takes advantage of the more powerful Genocider, using the united Contract Monster as a more menacing or intimidating distraction in the battlefield. This may also prove that the united Contract Monster is difficult to control, but is restrainable.

Advent Cards

Kamen Rider Ouja had the most Advent Cards out of any of the Riders. This was because he obtained two extra decks of cards by contracting with two of the Mirror world monsters that were previously contracted with Riders he defeated.







  • Like every Riders in Ryuki, Asakura died an ironic death: He killed the most Riders in the war (Gai, Raia, Imperer and Zolda), but never the ones he wanted to kill the most: Shinji, Tojo and Kitaoka. He originally entered the war to kill Kitaoka, but when he finally, technically achieved his goal by killing Zolda (who was, in truth, Goro Yura), he went mad with dissatisfaction and was himself killed. This also applies to his death in Rider Time: Ryuki. Asakura still manages to rack the highest kill count, but he fails to kill the ones he wanted to kill.
    • The number of Asakura's kills is also equal to the number of his deaths: he was killed by the authorities after losing his cool in the TV series, then impaled by Femme in the movie, then defeated by Kamen Rider (Dead Heat) Mach's Rider Kick in the Kamen Rider 4 special, and lastly killed by Brave's Level 4 form in the Beast Rider Squad special; and finally succumbed to his injuries after receiving Zolda's Shoot Vent and Knight's Final Vent in Rider Time: Ryuki.
  • Kamen Rider Gaim writer Gen Urobuchi once compared Asakura to Takatora Kureshima, due to his status as a villainous counterpart to the main Rider. This was later subverted later on, as his younger brother, is revealed to be the closest thing to Ouja. 
  • Asakura is the first villainous Kamen Rider in the Heisei Era to be purely evil.


          Ryuki LogoVillains

Kamen Riders
Masashi Sudoh | Jun Shibaura | Takeshi Asakura | Satoru Tojo | Mitsuru Sano | Kamen Rider Odin | Dark Shinji | Itsuro Takamizawa

Mirror Monsters
Spiders: Dispider | Mispider | Respider | Solospider
Zelles: Gigazelle | Megazelle | Negazelle | Omegazelle | Magazelle
Zebraskulls: Zebraskull Iron | Zebraskull Bronze
Boarders: Wildboarder | Shieldboarder
Biters: Zenobiter | Terabiter
Krakens: Bakraken | Wiskraken
Gulds: GuldThunder | GuldMirage | GuldStorm
Abyss: Abysshammer | Abysslasher
Buzzstingers: Buzzstinger Hornet | Buzzstinger Bee | Buzzstinger Wasp | Buzzstinger Broom | Buzzstinger Frost
Sheerghosts: Sheerghost | Raydragoon | Hydragoon

Shiro Kanzaki

           EX-AID LOGO Villains

Executives: Gamedeus | Parado | Graphite Bugster | Lovelica Bugster
Minor Bugsters: Salty Bugster | Alhambra Bugster | Revol Bugster | Motors Bugster | Gatton Bugster | Vernier Bugster | Kaiden Bugster | Charlie Bugster

Genm Corp.
Masamune Dan | Kuroto Dan | Ren Amagasaki | Hiiro Kagami

Next Genome Institute
Dr. Pac-Man | Soji Kuruse | Kazuhige Ryuzaki | Ageha Takeda | Saiko Yaotome

Foundation X
King Dark's Hologram | Kaisei Mogami
Beast Rider Squad: Kamen Rider Ouja | Kamen Rider Tiger | Kamen Rider Sasword | Kamen Rider Dark Kiva | Kamen Rider Beast

Machina Vision
Johnny Maxima | Kagenari Nagumo | Ninja-Players

Taiga Hanaya

           Zi-O Logo Villains

Time Jackers
Uhr | Ora | Sworz | Tid

Kaijin Riders

Oma Zi-O's Forces
Oma Zi-O | Woz | Kasshin | Dai Mazines

Future Riders
White Woz | Kamen Rider Ginga

Legendary Riders
Masato Kusaka | Kaito Kumon | Tsukasa Kadoya | Hajime Aikawa | Daiki Kaito | Shun Kageyama (Imposter)

Kamen Rider Barlckxs | Kagen | Jogen | Woz

Elementary Inves | Gamma Commandos | Humanoise | Salis Worms | Gryllus Worm

Rider Time Shinobi
Niji no Hebi
Yaminin | Stardust Ninja Dustards

Rider Time Ryuki
