How many movies have Ikue Otani and Kyoko Yufu collaborated on?

They have worked on 3 movies together! Their first movie together was Case Closed: Zero the Enforcer (2018) while their highest rated movie together was Detective Conan: The Scarlet Bullet (2021). They have not worked together since Detective Conan: The Scarlet Bullet (2021). They are most known for their mystery films together.