How many movies have Ai Kayano and Junichi Sato collaborated on?

They have worked on 7 movies together! Their first movie together was Tamayura: Graduation Photo Part 1 - Kizashi (2015) while their highest rated movie together was Tamayura: Graduation Photo Part 3 - Akogare (2015). They have not worked together since Aria the Benedizione (2021). They are most known for their animation films together.