How many movies have Ikue Otani and Maiko Ochiai collaborated on?

They have worked on 2 movies together! Their first movie together was Pokémon the Movie: Volcanion and the Mechanical Marvel (2016) while their highest rated movie together was Doraemon: Nobita's Chronicle of the Moon Exploration (2019). They have not worked together since Doraemon: Nobita's Chronicle of the Moon Exploration (2019).