How many movies have Ikue Otani and Kazuyuki Ikai collaborated on?

They have worked on 3 movies together! Their first movie together was Detective Conan: Captured in Her Eyes (2000) while their highest rated movie together was Zatch Bell! Attack of Mechavulcan (2005). They have not worked together since One Piece: The Desert Princess and the Pirates: Adventure in Alabasta (2007). They are most known for their animation films together.