How many movies have Hachirō Kai and Maria Mari collaborated on?

They have worked on 3 movies together! Their first movie together was Sekkusu dokku: Midarana chiryō (1980) while their highest rated movie together was Nympho Diver: G-String Festival (1981). They have not worked together since Moa sekushi kemono no yoni mo ichido (1981). They are most known for their comedy films together.