How many movies have Koji Okumura and Shirō Shimomoto collaborated on?

They have worked on 7 movies together! Their first movie together was Chikatetsu renzoku reipu (1985) while their highest rated movie together was Subway Serial Rape: Lover Hunting (1988). They have not worked together since Subway Serial Rape: Lover Hunting (1988). They are most known for their drama films together.