How many movies have Hiroaki Narikawa and Katsuhiko Watabiki collaborated on?

They have worked on 4 movies together! Their first movie together was Onihei Crime Files: Bungoro Amabiki (2009) and was their highest rated movie together. They have not worked together since Onihei Crime Files: The Final Kohen - Unryu Ken (2016). They are most known for their drama films together.