How many movies have Osamu Satō and Seiji Nakamitsu collaborated on?

They have worked on 6 movies together! Their first movie together was Geinô Ura Jôji: Juku Niku no Kanshoku (2002) while their highest rated movie together was Nurse Sisters (2003). They have not worked together since The Secret in the Attic (2005). They are most known for their drama films together.