How many movies have Hajime Ishigami and Shōji Sakai collaborated on?

They have worked on 5 movies together! Their first movie together was The ONANIE Club 3: Perverted Office Lady (1990) while their highest rated movie together was Molester and the Peeper : Athletic Women's Dormitory (1992). They have not worked together since Kyōko Aizen: Afternoon Love Affair (1993).