How many movies have Rie Nishiyama and Takeo Kitahara 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 The Three-Eyed One: The Prince of Devil Island (1985). They have not worked together since Foxes of Chironup (1987). They are most known for their animation films together.