How many movies have Koichi Sonoi and Saburo Fujiwara collaborated on?

They have worked on 5 movies together! Their first movie together was Hissatsu shimatsunin (1997) while their highest rated movie together was Onihei Crime Files: Bungoro Amabiki (2009). They have not worked together since Onihei Crime Files: Sutegoro Takahagi (2010). They are most known for their drama films together.