How many movies have Hiroshi Nawa and Ikuo Sekimoto collaborated on?

They have worked on 7 movies together! Their first movie together was Red Peony Gambler: Execution of Duty (1972) while their highest rated movie together was Terrifying Girls' High School: Delinquent Convulsion Group (1973). They have not worked together since Story of a Nymphomaniac (1975). They are most known for their drama films together.