How many movies have Tadashi Ashihara and Tomiemon Otomo collaborated on?

They have worked on 2 movies 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 Akagi no komori-uta (1957).