How many movies have Aya Kuki and Ryusei Nakao collaborated on?

They have worked on 6 movies together! Their first movie together was Go! Anpanman: Star-Spirited Dollie (2006) and was their highest rated movie together. They have not worked together since Go! Anpanman: Dororin and the Transformation Carnival (2022). They are most known for their animation films together.