How many movies have Shinji Ushiro and Yukiko Watabe collaborated on?

They have worked on 4 movies together! Their first movie together was Yo-kai Watch: The Movie (2014) while their highest rated movie together was Yo-kai Watch Shadowside: Resurrection of the Demon King (2017). They have not worked together since Yo-kai Watch Shadowside: Resurrection of the Demon King (2017). They are most known for their adventure films together.