How many movies have Monya Onoe and Sadao Yamanaka collaborated on?

They have worked on 3 movies together! Their first movie together was Umon's First Exploit (1929) while their highest rated movie together was Detective Umon's Diary, Story No. 6 (1930). They have not worked together since Iso-no-genta's Sword (1932). They are most known for their mystery films together.