How many movies have Kuninori Yamazaki and Wakafumi Kotama collaborated on?

They have worked on 10 movies together! Their first movie together was Chikan densha: Okumade nozoite (1986) while their highest rated movie together was Molester Train: Beware of Miniskirts (1988). They have not worked together since Molester Train: One Shot in the Morning (1989).