How many movies have Mami Koyama and Mari Shimizu acted in together?

They have worked on 2 movies together! Their first movie together was Undersea Super Train: Marine Express (1979) while their highest rated movie together was The Tale of Osamu Tezuka: I'm Son-Goku (1989). They have not worked together since The Tale of Osamu Tezuka: I'm Son-Goku (1989).