How many movies have Masateru Nishiyama and Tonayama Taiji collaborated on?

They have worked on 1 movie together! Their first movie together was Nihon Meisaku Kaidan Gekijō: Kōya Hijiri (1979) and was their highest rated movie together. They have not worked together since Nihon Meisaku Kaidan Gekijō: Kōya Hijiri (1979).