How many movies have Eitarō Ozawa and Ryuzo Nakayama collaborated on?

They have worked on 2 movies together! Their first movie together was こゝに幸あり・前篇 誘惑の都 (1956) and was their highest rated movie together. They have not worked together since こゝに幸あり・後篇 花咲く朝 (1956).