How many movies have Reiko Maki and Shinya Inoue collaborated on?

They have worked on 4 movies together! Their first movie together was (Maruhi) Shôsha Jôhô: Onna Kaishime Urioshimi (1973) while their highest rated movie together was Shinjuku Love Hotel: Secret Weekend Paradise (1973). They have not worked together since Kanto County Sex Unit (1973).