Kamen Rider Fourze 31

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Episode 31
Subaruboshi Kingdom
Kamen Rider Fourze episode
Writer Sanjou Riku
Director Sakamoto Koichi
Action Director Miyazaki Takeshi
Original air date April 15, 2012 (2012-04-15)
Viewership 7.4%
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Episode chronology
← Previous
Episode 30
Unneeded Sempai
Next →
Episode 32
Super Space Sword
Episode List
Kamen Rider Fourze
< Ep 30 Subaruboshi Kingdom
Ep 32 >
Aired with Go-Busters Mission 08
Super Hero Taisen >>

Climax Episode >>>

Important things that happened

  • Has the second part of the Crayon Shin-chan crossover. Used to promote the Super Hero Taisen and Crayon Shin-chan movies coming out.
  • Aries Zodiarts is revealed to be Yamada Tatsumori, the exchange student from Ama High to Subaruboshi High.
  • Aries has the power of sleep which can wake up Jirou, so he could press his Zodiarts Switch off.
  • Ryuusei ends up killing Gentarou as he was about to defeat Aries with Magnet States' Limit Break.

TV Asahi site
Toei site
Kamen Rider Official site


Aries Zodiarts

Ariesu Zodiatsu アリエス・ゾディアーツ
Aries Zodiarts.jpg

Switcher: Yamada Tatsumori (山田竜守)
Played by: Kawahara Kazuma
Height: 235cm
Weight: 209kg
Constellation: Aries
Characteristics/Powers: 人の生体活動を活性化、または鈍らせて眠らせる

TV Asahi site
Kamen Rider Official site



Voice Actor

Songs Used


  • Yamada's appearance in Class 2-B is a retcon. The footage used was Gentarou's first appearance in the classroom in episode 1. In that episode, Yamada was nowhere to be found.
  • Everyone in the Kamen Rider Club (sans Ryuusei and Oosugi) refers to Mei as "Ryuusei's girlfriend".
  • Shirakawa tries to warn Ryuusei with a book called Ningyoutsukai which means Puppeteer. This is a subtle warning that Yamada is secretly controlling all the staff and students in the school.
  • Yuuki copies Gentarou's transformation pose and catchphrase entirely.
  • First use of the Stamper Switch.
  • Meteor continues his Bruce Lee theme here by finishing Gentarou off with a one-inch punch, a move popularized by Lee.
  • The Amanogawa characters make fun of Shirakawa throughout the episode by mistaking her for being Ryuusei's girlfriend. This embarrasses her and she responds that she's not his girlfriend yet and that she's disappointed when she hears Ryuusei say they're just friends.
  • Fourze is the first Rider series in a while to have a secret identity thing going on. For the first time, the Rider Club finds out that Ryuusei and Meteor are the same person. His identity is revealed when Meteor betrays the Rider Club and Tachibana, causing Tachibana to cancel Meteor's transformation.
    • Gentarou actually realizes who Meteor's identity is just a moment before it's revealed, since Meteor said that Gentarou will accept anything for his friends. This is something that Gentarou recently said to Ryuusei, at the beginning of the episode. Plus, Meteor refers to Fourze as "Kisaragi".
  • Aries Zodiarts has the power over sleep. That's because Aries is a ram. Rams are sheep. Counting sheep to make one go to sleep.

Actor Trivia

Climax Episode

The Director's Cut of both episodes 31 and 32.


Original Creator: Ishinomori Shoutarou (石ノ森章太郎)
Supervisor: Onodera Akira (小野寺章)
Writer: Sanjou Riku (三条陸)
Director: Sakamoto Koichi (坂本浩一)
(Alpha Stunts)
Music: Naruse Shuhei (鳴瀬シュウヘイ)
Cinematographer: Kurata Kouji (倉田幸治)
Editor: Osada Naoki (長田直樹)
Action Director: Miyazaki Takeshi (宮崎剛)
(Japan Action Enterprise)
Tokusatsu Director: Butsuda Hiroshi (佛田洋)
  • TV Asahi (テレビ朝日)
  • Toei (東映)
  • ADK (エーディーケー)


Kamen Rider Fourze 31 Transcript