How many movies have Shintarō Katsu and Yūko Hamada acted in together?

They have worked on 6 movies together! Their first movie together was The Demon of Mount Oe (1960) while their highest rated movie together was Lone Wolf and Cub: Baby Cart to Hades (1972). They have not worked together since Lone Wolf and Cub: Baby Cart to Hades (1972).