How many movies have Kôji Kai and Yūko Katagiri acted in together?

They have worked on 3 movies together! Their first movie together was Coed Report: Yuko's White Breasts (1971) while their highest rated movie together was Night Spot: Drifting Flower (1972). They have not worked together since The Hidden Lover (1972). They are most known for their drama films together.