How many movies have Haruo Nakayama and Michimaro Otabe collaborated on?

They have worked on 16 movies together! Their first movie together was 旗本退屈男　謎の紅蓮塔 (1957) while their highest rated movie together was Tragedy of the Coolie Samurai (1963). They have not worked together since The Tattooed Hitman (1974).