How many movies have Hachirō Kai and Minoru Nobuoka collaborated on?

They have worked on 5 movies together! Their first movie together was Sukeban mafia: Chijoku (1980) while their highest rated movie together was Niku dorei: Kanashiki gangu (1982). They have not worked together since Niku dorei: Kanashiki gangu (1982). They are most known for their drama films together.