How many movies have Hiroshi Katsuno and Saburo Fujiwara collaborated on?

They have worked on 4 movies together! Their first movie together was Onihei Crime Files Special: Bandits (2006) while their highest rated movie together was Onihei Crime Files: Bungoro Amabiki (2009). They have not worked together since Onihei Crime Files: Conscience of a Worm (2011). They are most known for their crime films together.