How many movies have Kenji Ninomiya and Shinichi Fukumitsu collaborated on?

They have worked on 2 movies together! Their first movie together was Dragon Ball: Sleeping Princess in Devil's Castle (1987) while their highest rated movie together was Kindaichi Case Files Movie 1: The Opera House Murders (1996). They have not worked together since Kindaichi Case Files Movie 1: The Opera House Murders (1996).