How many movies have Hitomi Oba and Osamu Satō collaborated on?

They have worked on 4 movies together! Their first movie together was Geinô Ura Jôji: Juku Niku no Kanshoku (2002) while their highest rated movie together was New Tokyo Decadence: The Slave (2007). They have not worked together since New Tokyo Decadence: The Slave (2007).