Category:Fourze Arsenal

The Fourze arsenal was initiated by Utahoshi, Kengo's father seventeen years ago (prior to the series). He was an OSTO scientist who researched the possibility of extraterrestrial life and devised the Astro Switches seventeen years prior to the series; before the space station he worked on was destroyed, taking Kengo's father with it.

A year before the series started, Kengo Utahoshi received a letter and an Astro Switch from an anonymous person. The portal connecting to the Rabbit Hatch lunar base, which is all that remained of the OSTO complex, was opened in the locker in a abandoned club activity room when Kengo just so happened to throw the activated Switch inside. He discovered all about the Astro and Zodiarts Switches on the base and decided to follow through with his father's plans to fight the menace that is to come, expanding on the arsenal.

Tachibana has also shown a secret interest in fast-tracking the development of the Fourze arsenal, and as such has had his own rider Ryusei Sakuta, infiltrate the Kamen Rider Club. Ryusei aids the Club in some technical aspects. When he encounters technical problems beyond him, he consults Tachibana in secret (such as the case of the NS MagPhone.

Fourze Driver

 * Main article:Fourze Driver

The Fourze Driver was developed to weaponize the Astro Switches. Kengo had it ready if in case the Zodiarts began attacking. When Gentaro Kisaragi discovered its existence, and that Kengo would probably be unable to use it because of his condition, he rushed into taking on the responsibility of transforming into Fourze, to Kengo's protests.

NS MagPhone

 * Main article:Fourze Driver