How many movies have Shotaro Ishinomori and Takeshi Sasaki collaborated on?

They have worked on 2 movies together! Their first movie together was All Together! Seven Kamen Riders!! (1976) while their highest rated movie together was Birth of the 10th! Kamen Riders All Together!! (1984). They have not worked together since Birth of the 10th! Kamen Riders All Together!! (1984).