How many movies have Denjirō Ōkōchi and Yōko Umemura acted in together?

They have worked on 6 movies together! Their first movie together was Shinpan Ôoka seidan: Dai-ippen (1928) while their highest rated movie together was Ōoka Cases Devil's Image - Part One (1930). They have not worked together since Zuku ôoka seidan mazo kaiketsu-hen (1931).