How many movies have Katsuo Nakamura and Tadashi Ashihara collaborated on?

They have worked on 1 movie together! Their first movie together was 黒姫秘帳 前篇 奪われた鬼面、後篇 不知火の美女 (1956) and was their highest rated movie together. They have not worked together since 黒姫秘帳 前篇 奪われた鬼面、後篇 不知火の美女 (1956).