How many movies have Tetsuya Kawata and Yasumasa Koyama collaborated on?

They have worked on 3 movies together! Their first movie together was The Anthem of the Heart (2015) while their highest rated movie together was Rascal Does Not Dream of a Dreaming Girl (2019). They have not worked together since Rascal Does Not Dream of a Dreaming Girl (2019). They are most known for their animation films together.