How many movies have Ikue Otani and Makoto Takahoko 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 Lupin the Third vs. Detective Conan: The Movie (2013). They have not worked together since Lupin the Third vs. Detective Conan: The Movie (2013).