How many movies have Akinori Nagaoka and Rie Nishiyama collaborated on?

They have worked on 3 movies together! Their first movie together was Dr. Slump: Hoyoyo! Space Adventure (1982) while their highest rated movie together was Go! Anpanman: The Shining Star's Tear (1989). They have not worked together since The Diary of Anne Frank (1995). They are most known for their animation films together.