How many movies have Kazuo Numata and Sachi Hamano collaborated on?

They have worked on 4 movies together! Their first movie together was Boku no oppai ga hatsujô shita riyû (2014) while their highest rated movie together was Pervert Observation Shame Hole Bare (2015). They have not worked together since Onna sagi-shi to bijin singer: O-atsui no wa dotchi? (2015). They are most known for their drama films together.