How many movies have Keiji Sada and Kōshichi Yoshida collaborated on?

They have worked on 3 movies together! Their first movie together was I Will Buy You (1956) while their highest rated movie together was The Human Condition II: Road to Eternity (1959). They have not worked together since The Human Condition II: Road to Eternity (1959). They are most known for their drama films together.