How many movies have Ichirô Kojima and Sonny Chiba acted in together?

They have worked on 6 movies together! Their first movie together was Drifting Detective: Tragedy in the Red Valley (1961) while their highest rated movie together was Drifting Detective: Black Wind in Harbor (1961). They have not worked together since All Rascals (1962). They are most known for their crime films together.