How many movies have Tomochi Kosaka and Yukiko Iwai collaborated on?

They have worked on 21 movies together! Their first movie together was Detective Conan: Crossroad in the Ancient Capital (2003) while their highest rated movie together was Detective Conan: Episode One - The Great Detective Turned Small (2017). They have not worked together since Case Closed: The Million-Dollar Pentagram (2024). They are most known for their animation films together.