How many movies have Hatsuo Yamaya and Yoshitaka Kawai collaborated on?

They have worked on 1 movie together! Their first movie together was Bakumatsu seishun graffiti: Ronin Sakamoto Ryoma (1986) and was their highest rated movie together. They have not worked together since Bakumatsu seishun graffiti: Ronin Sakamoto Ryoma (1986).