How many movies have Masato Kato and Yukiko Watabe collaborated on?

They have worked on 4 movies together! Their first movie together was Loups=Garous (2010) while their highest rated movie together was Yo-kai Watch: The Movie - The Great Adventure of the Flying Whale & the Double World, Meow! (2016). They have not worked together since Yo-kai Watch: The Movie - The Great Adventure of the Flying Whale & the Double World, Meow! (2016). They are most known for their animation films together.