How many movies have Aki Yamauchi and Masahito Sawada collaborated on?

They have worked on 3 movies together! Their first movie together was Yo-kai Watch: The Movie - The Great Adventure of the Flying Whale & the Double World, Meow! (2016) while their highest rated movie together was Yo-kai Watch: Forever Friends (2018). They have not worked together since NiNoKuni (2019). They are most known for their fantasy films together.