How many movies have Ikue Otani and Takashi Hirabayashi collaborated on?

They have worked on 2 movies together! Their first movie together was Pokémon the Movie: Kyurem vs. the Sword of Justice (2012) while their highest rated movie together was Detective Conan: Episode One - The Great Detective Turned Small (2017). They have not worked together since Detective Conan: Episode One - The Great Detective Turned Small (2017).