How many movies have Katsuhiko Fujii and Masayoshi Yamaoka collaborated on?

They have worked on 3 movies together! Their first movie together was New Eros Schedule Book Concubine Secrets: Sexual Technique Education (1973) while their highest rated movie together was Oryu's Passion: Bondage Skin (1975). They have not worked together since Oryu's Passion: Bondage Skin (1975).