How many movies have Futoshi Sakamoto and Yukikazu Morikubo collaborated on?

They have worked on 7 movies together! Their first movie together was Molester Train: Momoe's Ass (1983) while their highest rated movie together was Groper Train: One Minute Before Departure (1985). They have not worked together since (Marunama) Terekura: Nigiritagaru Hitozuma-tachi (1986).