The Kamen Rider Club (仮面ライダー部, Kamen Raidā Bu) is a club that Gentaro Kisaragi forms to gain new friends at Amanogawa High School, named after Fourze's predecessors: the various Kamen Riders. The club's members assist Kamen Rider Fourze in his battles against the Zodiarts. In addition, they investigate the urban legends that surround the existence of the past Kamen Riders. The Kamen Rider Club's headquarters are the remains of the Rabbit Hatch (ラビットハッチ, Rabitto Hatchi) lunar base owned by the Outer Space Technology Organization (外宇宙技術開発機構, Gai Uchū Gijutsu Kaihatsu Kikō, OSTO) which developed the Kamen Rider Fourze technology and the Zodiarts Switches. The Rabbit Hatch can be accessed by a Cosmic Energy (コズミックエナジー, Kozumikku Enajī) powered portal found in a locker in an abandoned part of the AGHS campus. In episode 11, the locker that connects the Rabbit Hatch is removed from the abandoned club room, leaving Kengo stranded on the Moon, and it is later seemingly destroyed by the Pyxis Zodiarts. However, it is successfully recovered by Tomoko after she discovers that Mr. Ohsugi took the real locker for himself after believing Yuki's lie about it being Ms. Sonoda's locker while she was a student. They proceed to permanently secure the locker in place with screws to prevent it from ever being easily moved away again. Tomoko even sets up various magical charms around the locker for additional "protection. " At the end of the series, the Rabbit Hatch is destroyed in an attack by the Leo Zodiarts and Sagittarius Nova. After Sagittarius Nova's defeat, the Kamen Rider Club reinvents itself in the series epilogue as the Earth-based Space Kamen Rider Club.