How many movies have Nao Saeki and Shōji Sakai collaborated on?

They have worked on 4 movies together! Their first movie together was Seifuku bôkôma: Hôkago-gari (1991) while their highest rated movie together was Secret Spot: Horny Massage (1993). They have not worked together since Monzetsu!! Mibôjin Salon (1995).