How many movies have Shoji Nakayama and Tatsuo Yamada collaborated on?

They have worked on 4 movies together! Their first movie together was 剣聖　暁の三十六番斬り (1957) while their highest rated movie together was Traitors of the Blue Castle (1957). They have not worked together since Ningyō Sashichi torimonochō: Koshimoto Irezumi Shibijin (1958).