How many movies have Hidemi Maruyama and Keiju Kobayashi acted in together?

They have worked on 2 movies together! Their first movie together was The Case Files of Detective Superintendent Muta 25 - The Case of the Woman Who Slayed at Lake Toya (1998) 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).