How many movies have Akiko Ueda and Mari Okada collaborated on?

They have worked on 1 movie together! Their first movie together was Until I, Who Was Unable to Go to School, Wrote "anohana" and "The Anthem of the Heart" (2018) and was their highest rated movie together. They have not worked together since Until I, Who Was Unable to Go to School, Wrote "anohana" and "The Anthem of the Heart" (2018).