How many movies have Koichi Yamadera and Sakiko Tamagawa acted in together?

They have worked on 8 movies together! Their first movie together was Ranma ½: The Movie — The Battle of Nekonron: The Fight to Break the Rules! (1991) while their highest rated movie together was Ghost in the Shell: Stand Alone Complex - The Laughing Man (2005). They have not worked together since Ghost in the Shell: SAC_2045 Sustainable War (2021). They are most known for their animation films together.