How many movies have Hashizo Okawa and Yoshitake Hisa collaborated on?

They have worked on 20 movies together! Their first movie together was 旗本退屈男 謎の決闘状 (1955) while their highest rated movie together was Shimizu Port of Chivalry (1957). They have not worked together since Chivalrous Nature (1965). They are most known for their drama films together.