Five Riders vs. King Dark

Kamen Rider The First is a 1972 Japanese tokusatsu Film. It is a spinoff of the television series Kamen Rider.

Synopsis
During a motocross practice, Keisuke Jin is ambushed by two Myth Cyborgs created by a secret organization that's attempting to control Japan, G.O.D. He transforms into Kamen Rider X, but little does he know that his battle is recorded and analyzed by King Dark, G.O.D.'s commander, to create a super cyborg. Other G.O.D. cyborgs are attacking all over Tokyo and, in the middle of the crisis, the original four Riders return to Japan from different countries around the world. The five Riders unite to lead a counter attack against G.O.D.

Hiroshi Fujioka and Takeshi Sasaki reprised their roles as Kamen Rider and Kamen Rider  in this movie, before going on to be absent from the films of the franchise until Let's Go Kamen Riders, almost 36 years later. This movie also marks, even today, the last film appearance of the original Takeshi Hongo and Hayato Ichimonji in their human forms, although it was done by reusing footage from earlier features.