How many movies have Shunsuke Kikuchi and Shunya Ito collaborated on?

They have worked on 5 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 White Snake Enchantment (1983). They are most known for their crime films together.