How many movies have Kazuhiko Yamaguchi and Masashi Ishibashi collaborated on?

They have worked on 8 movies together! Their first movie together was Sister Street Fighter (1974) while their highest rated movie together was Which Is Stronger, Karate or the Tiger? (1976). They have not worked together since The Tragedy in the Devil-Mask Village (1978). They are most known for their action films together.