How many movies have Akio Shimada and Yuka Kawai collaborated on?

They have worked on 4 movies together! Their first movie together was Rainbow Fireflies (2012) while their highest rated movie together was Doraemon: Nobita's New Dinosaur (2020). They have not worked together since Doraemon: Nobita's New Dinosaur (2020). They are most known for their animation films together.