How many movies have Isao Matsumoto and Shun Ueda collaborated on?

They have worked on 4 movies together! Their first movie together was Hooligans on Buggies (1970) while their highest rated movie together was Wandering Ginza Butterfly (1972). They have not worked together since Delinquent Boss: Devour to the Bone (1972). They are most known for their action films together.