How many movies have Hideyuki Hakuya and Misato Otani collaborated on?

They have worked on 2 movies together! Their first movie together was Black Jack: The Two Doctors in Black (2005) while their highest rated movie together was Go! Anpanman: Star-Spirited Dollie (2006). They have not worked together since Go! Anpanman: Star-Spirited Dollie (2006).