How many movies have Katsuhiko Watabiki and Toshiaki Tsushima collaborated on?

They have worked on 9 movies together! Their first movie together was The Boss' Wife (1988) while their highest rated movie together was Onihei's Detective Records (1995). They have not worked together since Onihei Crime Files: The Final Kohen - Unryu Ken (2016). They are most known for their crime films together.