How many movies have Ikue Otani and Mikio Mori collaborated on?

They have worked on 4 movies together! Their first movie together was Martian Successor Nadesico: The Motion Picture - Prince of Darkness (1998) while their highest rated movie together was One Piece: Baron Omatsuri and the Secret Island (2005). They have not worked together since Lupin the Third vs. Detective Conan: The Movie (2013). They are most known for their action films together.