How many movies have Hachirō Kai and Yasuaki Uegaki collaborated on?

They have worked on 10 movies together! Their first movie together was Uno Kôichirô no uwaki nikki (1980) while their highest rated movie together was Female Teacher: In Front of the Students (1982). They have not worked together since Female Teacher: In Front of the Students (1982). They are most known for their drama films together.