How many movies have Kaori Nazuka and Makoto Watanabe collaborated on?

They have worked on 9 movies together! Their first movie together was Towa no Quon 1: The Ephemeral Petals (2011) while their highest rated movie together was Towa no Quon 3: The Complicity of Dreams (2011). They have not worked together since Eureka: Eureka Seven Hi-Evolution (2021). They are most known for their action films together.