Go-Nin Raidaa tai kingu Daaku 1974

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. (Government of Darkness). 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.

Cast:

Ryô Hayami
Keisuke Jin / Kamen Rider X 

Hiroshi Fujioka
Takeshi Hongo / Kamen Rider #1 

Takeshi Sasaki
Hayato Ichimonji / Kamen Rider #2 

Hiroshi Miyauchi
Shiro Kazami / Kamen Rider V3 

Akira Yamaguchi
Jôji Yûki / Riderman 

Akiji Kobayashi
Tobei Tachibana