How many movies have Keiju Kobayashi and Masaru Shinozuka acted in together?

They have worked on 1 movie 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 The Case Files of Detective Superintendent Muta 25 - The Case of the Woman Who Slayed at Lake Toya (1998).