How many movies have Azuma Morisaki and Naozumi Yamamoto collaborated on?

They have worked on 8 movies together! Their first movie together was Song of Love (1967) while their highest rated movie together was It's Tough Being a Man (1969). They have not worked together since Onna Ikitemasu: Sakariba Wataridori (1972). They are most known for their comedy films together.