How many movies have Jin Nakayama and Kōichi Saitō collaborated on?

They have worked on 8 movies together! Their first movie together was Whispering Joe (1967) while their highest rated movie together was The Rendezvous (1972). They have not worked together since Takehisa Yumeji monogatari: koi suru (1975). They are most known for their drama films together.