How many movies have Masayuki Aoki and Mitsuko Horie collaborated on?

They have worked on 1 movie together! Their first movie together was Dr. Slump and Arale-chan: Hoyoyo! The Treasure of Nanaba Castle (1984) and was their highest rated movie together. They have not worked together since Dr. Slump and Arale-chan: Hoyoyo! The Treasure of Nanaba Castle (1984).