How many movies have Ikue Otani and Tomoyuki Sugano collaborated on?

They have worked on 6 movies together! Their first movie together was Detective Conan: Crossroad in the Ancient Capital (2003) while their highest rated movie together was One Piece Film: Strong World (2009). They have not worked together since Lupin the Third vs. Detective Conan: The Movie (2013). They are most known for their animation films together.