How many movies have Seigo Inoue and Sonny Chiba collaborated on?

They have worked on 3 movies together! Their first movie together was The Executioner II: Karate Inferno (1974) while their highest rated movie together was The Decisive Power of Aikido (1975). They have not worked together since Legend of the Eight Samurai (1983). They are most known for their action films together.