How many movies have Hirotaka Kato and Kei Hosogai acted in together?

They have worked on 1 movie together! Their first movie together was Bungo Stray Dogs on Stage: Dazai, Chuuya, Age Fifteen (2021) and was their highest rated movie together. They have not worked together since Bungo Stray Dogs on Stage: Dazai, Chuuya, Age Fifteen (2021).