How many movies have Mami Koyama and Masaharu Sato acted in together?

They have worked on 11 movies together! Their first movie together was Toward the Terra (1980) while their highest rated movie together was Dr. Slump and Arale-chan: Hoyoyo! The Great Race Around The World (1983). They have not worked together since City Hunter Special: Goodbye My Sweetheart (1997). They are most known for their animation films together.