How many movies have Toshihiko Oda and Yoshihiro Kawasaki collaborated on?

They have worked on 5 movies together! Their first movie together was High School Emanuelle: Wet Saturday (1978) while their highest rated movie together was Flesh Target: Rape! (1979). They have not worked together since Sekushî purin: Kuse ni narisô (1981). They are most known for their drama films together.