How many movies have Keiichi Ozawa and Tetsuya Watari collaborated on?

They have worked on 11 movies together! Their first movie together was Velvet Hustler (1967) while their highest rated movie together was Outlaw: Gangster VIP 2 (1968). They have not worked together since Expelled from the Kanto Mob (1971). They are most known for their action films together.