How many movies have Kenji Sonoda and Tokio Hiramatsu collaborated on?

They have worked on 4 movies together! Their first movie together was Rainbow Over Paris (1970) while their highest rated movie together was Crimson Bat - Oichi: Wanted, Dead or Alive (1970). They have not worked together since Miyamoto Musashi (1973). They are most known for their drama films together.