|This article is about a/an organization in Kamen Rider Fourze.|
- "The Kamen Rider Club. A club that exists to protect this school from monsters."
- ―Gentaro's description to Kengo about the club.[src]
The Kamen Rider Club (仮面ライダー部 Kamen Raidā Bu) is a school club at Amanogawa High School (AGHS) that was founded by Gentaro Kisaragi, with Yuki Jojima as co-founder, after being inspired by the urban legends of the previous Kamen Riders.
After the fight between Fourze and Sagittarius Nova, the Kamen Rider Club was renamed into the Space Kamen Rider Club (宇宙仮面ライダー部 Uchū Kamen Raidā Bu), due to Gentaro's plan to befriend aliens.
The club's main purpose is to assist Gentaro as Kamen Rider Fourze in his fight against the Zodiarts.
All members of the club are sworn to secrecy about the club, and 'membership' officially begins when the member and Gentaro shake hands. The only exceptions are Ryuusei (who personally asks and wasn't allowed until Gentaro saw his 'true personality'), and Ohsugi, who announced that he would be the club's adviser.
In Movie War Ultimatum, the founding members were now alumni and have attained their respective dreams. Gentaro returned to AGHS as the club's new faculty adviser.
The club's headquarters is within the Rabbit Hatch, accessed by a Cosmic Energy powered portal in a locker in an abandoned part of the campus. All members are invited to go onto the moon's surface as part of an initiation to the club.
After the series finale, the club's activities are now held elsewhere as the Rabbit Hatch was destroyed by Sagittarius.
In Movie War Ultimatum, the club gained a new clubroom similar to their old locker's storage room.
They are the founding members of the club who fought to protect Amanogawa High from the Horoscopes and their Zodiarts.
- Gentaro Kisaragi (Founder; faculty adviser in Movie War Ultimatum; Kamen Rider Fourze)
- Kengo Utahoshi (Technician; Former Powerdizer pilot)
- Yuki Jojima (Co-Founder; Second President)
- Miu Kazashiro (First President; Queen Dizer Pilot)
- JK (Informant; JK Dizer pilot)
- Shun Daimonji (Main Powerdizer pilot)
- Tomoko Nozama (Spiritual adviser)
The following are the members that joined them shortly after the club's founding. They also shared their own adventures with the original members.
- Ryusei Sakuta (Temporary member; Secret agent; Kamen Rider Meteor)
- Chuta Ohsugi (Faculty advisor)
- Ran Kuroki (Became Pisces Zodiarts before being saved)
- Haru Kusao (Became the Musca Zodiarts before being saved)
- Nadeshiko Misaki (Temporary member; SOLU; Kamen Rider Nadeshiko)
The following are the new members to join during the events of Movie War Ultimatum, and remained during Kamen Rider Zi-O. As Gentaro became a teacher, he acted as faculty advisor.
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