How many movies have Ichiro Yamamoto and Shintarō Katsu acted in together?

They have worked on 5 movies together! Their first movie together was Zatoichi and the Chess Expert (1965) while their highest rated movie together was Zatoichi Meets the One-Armed Swordsman (1971). They have not worked together since Hanzo the Razor: Sword of Justice (1972). They are most known for their drama films together.