How many movies have Ryōsuke Kagawa and Yukio Kaihara collaborated on?

They have worked on 8 movies together! Their first movie together was Blood Spilled at Takadanobaba (1937) while their highest rated movie together was Gate of Hell (1953). They have not worked together since Jirocho Fuji 2: The Chivalrous (1960). They are most known for their drama films together.