How many movies have Kyōichi Satō and Shingo Yamashiro acted in together?

They have worked on 13 movies together! Their first movie together was Rub Out the Past (1966) while their highest rated movie together was Lone Wolf and Cub: Baby Cart in the Land of Demons (1973). They have not worked together since Bandits vs. Samurai Squadron (1978). They are most known for their crime films together.