How many movies have Tsutomu Ohshiro and Yohko Ariizumi collaborated on?

They have worked on 2 movies together! Their first movie together was Road to Ninja: Naruto the Movie (2012) while their highest rated movie together was Yo-kai Watch: The Movie - The Great King Enma and the Five Tales, Meow! (2015). They have not worked together since Yo-kai Watch: The Movie - The Great King Enma and the Five Tales, Meow! (2015).