How many movies have Hirofumi Masuda 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 the Movie: Nobita's Earth Symphony (2024). They are most known for their fantasy films together.