How many movies have Haruki Iwata and Toru Nakane collaborated on?

They have worked on 3 movies together! Their first movie together was Extremely Wild Genuine Sex: Night of the Perverts (1990) while their highest rated movie together was Promiscuous Wife's Sexuality: Pleasure Hunting (1992). They have not worked together since Molester's Commuter Train: Office Ladys' Sexuality (1993).