How many movies have Masami Otsuka and Masayuki Katô collaborated on?

They have worked on 2 movies together! Their first movie together was Doraemon: Nobita and the Haunts of Evil (1982) while their highest rated movie together was Doraemon: Nobita's Great Adventure in the World of Magic (1984). They have not worked together since Doraemon: Nobita's Great Adventure in the World of Magic (1984).