How many movies have Kanji Amao and Rika Sudo collaborated on?

They have worked on 4 movies together! Their first movie together was Terrifying Girls' High School: Women's Violent Classroom (1972) while their highest rated movie together was Girl Boss: Escape From Reform School (1973). They have not worked together since Girl Boss: Escape From Reform School (1973). They are most known for their crime films together.