How many movies have Hiro Matsuda and Nenji Kobayashi collaborated on?

They have worked on 7 movies together! Their first movie together was Female Prisoner #701: Scorpion (1972) while their highest rated movie together was Female Prisoner Scorpion: Jailhouse 41 (1972). They have not worked together since Night Train (1987). They are most known for their action films together.