Titular Rider of [[Kamen Rider Fourze (series)|Kamen Rider Fourze]], twenty-second show of the Kamen Rider series and thirteenth of the Heisei generation, as well as a celebration of the series's 40th anniversary.

[[Kisaragi Gentarou|Kisaragi Gentaro]] is a self-styled delinquent and second-year transferee to Amanogawa High School who wants to make friends with his schoolmates. After witnessing an attack by the Zodiarts, constellation-themed monsters derived from human hosts wielding Zodiart Switches, he receives the Fourze Driver from his childhood friend [[Joujima Yuuki|Jojima Yuuki]] and transforms into Kamen Rider Fourze to fight the Zodiarts. Together with Yuuki and reluctant loner [[Utahoshi Kengo]], Gentaro founds the Kamen Rider Club to investigate potential Zodiarts and urban legends involving past Kamen Riders.

Fourze uses Astro Switches, 40 switch-like devices divided among the Switch Sockets corresponding to his arms and legs, of which four must be equipped at once to allow him to transform, and which can be used to equip his limbs with weapons or change his appearance.