How many movies have Naoki Oka and Shōji Sakai collaborated on?

They have worked on 4 movies together! Their first movie together was Molester and Peeping in the Nunnery Toilet (2000) while their highest rated movie together was Targeted Girls’ Dormitory 3: My Senior is a Lesbian (2008). They have not worked together since Targeted Girls’ Dormitory 3: My Senior is a Lesbian (2008).