How many movies have Ryutaro Otomo and Taizô Kawashima collaborated on?

They have worked on 16 movies together! Their first movie together was The Black Hooded Man 2 (1955) while their highest rated movie together was Sazen Tange: Heavenly Clouds, Earthly Dragon (1962). They have not worked together since Group Burglars Break the Magistrate's Office (1964). They are most known for their drama films together.