How many movies have Masato Kai and Yoshimi Shinozaki collaborated on?

They have worked on 3 movies together! Their first movie together was Murder on Raicho 9 (1987) and was their highest rated movie together. They have not worked together since Kyotaro Nishimura's Travel Mystery - Soya Honsen Murder Incident (2001). They are most known for their mystery films together.