How many movies have Kunihiko Murai and Shintarō Katsu collaborated on?

They have worked on 5 movies together! Their first movie together was Kaoyaku (1971) while their highest rated movie together was New Hoodlum Soldier Story: Firing Line (1972). They have not worked together since Hanzo the Razor: Sword of Justice (1972). They are most known for their drama films together.