How many movies have Chiyoo Umeda and Shizu Ōsawa collaborated on?

They have worked on 4 movies together! Their first movie together was Umi wa furimukanai (1969) while their highest rated movie together was Crimson Bat - Oichi: Wanted, Dead or Alive (1970). They have not worked together since A Scream from Nowhere (1977). They are most known for their drama films together.