How many movies have Ikue Otani and Mai Kuraki acted in together?

They have worked on 4 movies together! Their first movie together was Case Closed: Countdown to Heaven (2001) while their highest rated movie together was Detective Conan: The Raven Chaser (2009). They have not worked together since Case Closed: The Crimson Love Letter (2017). They are most known for their mystery films together.