How many movies have Gen Itakura and Shigeru Saito collaborated on?

They have worked on 4 movies together! Their first movie together was The Disappearance of Haruhi Suzumiya (2010) while their highest rated movie together was Violet Evergarden: The Movie (2020). They have not worked together since Violet Evergarden: The Movie (2020). They are most known for their animation films together.