How many movies have Ikue Otani and Kenichi Arai collaborated on?

They have worked on 2 movies together! Their first movie together was Pokémon the Movie: Genesect and the Legend Awakened (2013) while their highest rated movie together was Pokémon the Movie: Hoopa and the Clash of Ages (2015). They have not worked together since Pokémon the Movie: Hoopa and the Clash of Ages (2015).