How many movies have Akane Koizumi and Shōji Sakai collaborated on?

They have worked on 3 movies together! Their first movie together was Chikan to nozoki: Neesan no shinshitsu (1991) while their highest rated movie together was Honban: Vibe sekkan (1992). They have not worked together since Shaved Bondage Demon (1992). They are most known for their horror films together.