This article is about a/an episode in Kamen Rider Ryuki.

Room 401 (401号室 Yonhyakuichigōshitsu) is the forty-second episode of Kamen Rider Ryuki.


  • Mitsuru accepts both sides' offer to ally with them but ultimately chooses Hideyuki & Tojo.
  • Shiro tells Asakura where Tojo & Hideyuki are and tells him to kill them. Asakura later finds out that they aren't there, until he confronts Shinji, Ren and Shuichi at the same time.
  • Reiko questions Shuichi about the thing that attacked her last time.
  • Ren is enraged by Shinji's decision to include Mitsuru as his comrade.
  • Kagawa brings Tojo to lunch with his family to teach him the moral lesson about being a hero.
  • Tojo kills Hideyuki and shatters the Alternative Deck.


to be added


Guest Cast

Advent Cards


Tiger's Strike Vent Card

  • Cards used:
    • Ryuki:
      • Sword Vent
    • Tiger:
      • Final Vent
    • Imperer:
      • Spin Vent, Gigazelle
    • Alternative Zero:
      • Psyco-Rogue
  • Weapons/Powers summoned:
    • Ryuki:
      • Dragsaber
    • Tiger:
      • Crystal Break
    • Imperer:
      • Gigazelle Stab, Gigazelle
    • Alternative Zero:
      • Psyco-Rogue
  • Advent Card appeared before episode's preview:
    • Strike Vent (Tiger)


to be added


  • This episode aired alongside Ninpu Sentai Hurricaneger episode 40, Scroll 40: Decoy and Ninja Law.
  • Viewership: 8.7%
  • When Shuichi confronts Asakura in the vacant Room 401, he told Asakura that he'll be his "main dish".
    • This catchphrase would be used 11 years later in Kamen Rider Wizard, with Kousuke Nitoh using Shuichi's words as his main catchphrase every time he performs his finisher.
  • First and only time the Psychorogue Advent card is used in this episode.
  • Final appearance of Hideyuki Kagawa.
    • With Kagawa's death, this marks the end of the Alternative Riders, leaving Tojo as the last surviving member of Kagawa's Research Lab.
  • Up until this episode, the number of victims that died inside the Mirror World are 4 people so far. Miyuki Tezuka doesn't count, since he was outside of the Mirror World thanks to Shinji, but dies later after being struck by Ouja's Veno Crash.

Digital Releases

Ryuki DVD Vol 11

Kamen Rider Ryuki Volume 11, DVD cover

  • The DVD Release of Kamen Rider Ryuki Volume 11 features episodes 41-45.
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    Kamen Rider Ryuki Box 3, Blu-ray cover

  • The Blu-ray Release of Kamen Rider Ryuki Volume 3 features episodes 35-50.[1]


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