How many movies have Sakiko Tamagawa and Sumi Shimamoto acted in together?

They have worked on 6 movies together! Their first movie together was Lullaby for Wednesday's Cinderella (1987) while their highest rated movie together was Chocchan Monogatari (1996). They have not worked together since Detective Conan: The Story of Ai Haibara: Black Iron Mystery Train (2023). They are most known for their animation films together.