How many movies have Harumi Arai and Ryokutarô Hanai acted in together?

They have worked on 2 movies together! Their first movie together was Watch Out, Crimson Bat! (1969) while their highest rated movie together was Crimson Bat - Oichi: Wanted, Dead or Alive (1970). They have not worked together since Crimson Bat - Oichi: Wanted, Dead or Alive (1970).