How many movies have Katsumi Okamoto and Takeshi Matsumoto collaborated on?

They have worked on 2 movies together! Their first movie together was Destination Station Series - Homicide Assignment (2001) and was their highest rated movie together. They have not worked together since Inspector Muta's Incident Files: Yokohama to Kushiro Field. The Mystery of the Triple Murder That Only Marimo Knows. (2001).