How many movies have Hirofumi Masuda and Hiroki Kawashima collaborated on?

They have worked on 2 movies together! Their first movie together was Towa no Quon 6: Eternal Quon (2011) 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).