How many movies have Kumiko Sakamoto and Makoto Watanabe collaborated on?

They have worked on 3 movies together! Their first movie together was Eureka Seven Hi-Evolution (2017) while their highest rated movie together was Eureka: Eureka Seven Hi-Evolution (2021). They have not worked together since Eureka: Eureka Seven Hi-Evolution (2021). They are most known for their action films together.