How many movies have Hiromi Niioka and Tomoko Yamada collaborated on?

They have worked on 3 movies together! Their first movie together was Pokémon the Movie: Volcanion and the Mechanical Marvel (2016) while their highest rated movie together was Yo-kai Watch Shadowside: Resurrection of the Demon King (2017). They have not worked together since Pokémon the Movie: Secrets of the Jungle (2020). They are most known for their fantasy films together.