kamen Rider: Reiwa The First Generation is the 11th Movie War crossover film of Kamen Rider Zero-One and Kamen Rider Zi-O. It is intended to be the first successor to the Heisei Generations Series, and serves as a tribute to the original Kamen Rider series. In the film, Sougo travels to the World of Zero-One to assist Aruto in fixing the damages caused by a Time Jacker, while Aruto learns of his family's history as well as his own powers.