How many movies have Ai Satou and Naoko Matsui acted in together?

They have worked on 3 movies together! Their first movie together was The Cake Tree in the Ruins (2006) while their highest rated movie together was Death Note Relight 1: Visions of a God (2007). They have not worked together since Detective Conan: Episode One - The Great Detective Turned Small (2017). They are most known for their animation films together.