Kamen Rider Infiniva

Kamen Rider Infiniva (仮面ライダーインフィニバ) is a Japanese fan-adaptation of the  created by, written and directed by Kei Sunado, and produced by  and.

It is the first Kamen Rider series to be directed by Kei Sunado, who would go on to direct multiple series afterwards, even after the end of Infiniva, also directing multiple future adaptations of the which he would link together into one cohesive universe. Besides that, it is the first series in the history of the franchise to air more than two seasons, the previous record held by '/' and  which would air two seasons. It would also serve as the first fully-directed cross-over season of the franchise, previous examples of cross-overs being limited to movies and specials.

The series would officially begin airing in the fourth quarter of 2019, with the first episode airing on a Saturday, marking the first time a Kamen Rider series would air on a different time-slot than usual, taking the Saturday time-slot as the Sunday time-slot would be taken up by its main franchise counterpart, . It would then air alongside Zero-One in the Super Hero Time slot, being partnered by their Super Sentai counterpart, Kishiryū Sentai Ryūsōjā (騎士竜戦隊リュウソウジャー). After Ryusoulger's conclusion, they would later be joined by the 2020 Super Sentai series, Mashin Sentai Kirameijā (魔進戦隊キラメイジャー).