How many movies have Anna Yamaguchi and Rie Aoki collaborated on?

They have worked on 4 movies together! Their first movie together was One Piece: Episode of Chopper Plus: Bloom in the Winter, Miracle Cherry Blossom (2008) while their highest rated movie together was Zorori the Naughty Hero: Super Adventure! (2012). They have not worked together since Mass Effect: Paragon Lost (2012). They are most known for their animation films together.