How many movies have Kōsei Saitō and Shōhei Hino collaborated on?

They have worked on 5 movies together! Their first movie together was 長七郎江戸日記スペシャル 長七郎 大奥まかり通る (1989) while their highest rated movie together was Onihei Crime Files: Sutegoro Takahagi (2010). They have not worked together since Onihei Crime Files: Sutegoro Takahagi (2010). They are most known for their drama films together.