How many movies have Riki Harada and Tomisaburō Wakayama acted in together?

They have worked on 5 movies together! Their first movie together was Eight Men to Kill (1972) while their highest rated movie together was Lone Wolf and Cub: Baby Cart in Peril (1972). They have not worked together since Lullaby to Kill (1977). They are most known for their action films together.