How many movies have Kazuo Kasahara and Shingo Yamashiro collaborated on?

They have worked on 16 movies together! Their first movie together was Bloody Record of the Shinsengumi (1963) while their highest rated movie together was Eighteen Years in Prison (1967). They have not worked together since Battles Without Honor and Humanity: The Complete Saga (1980). They are most known for their crime films together.