How many movies have Aya Hirano and Natsuko Kuwatani acted in together?

They have worked on 4 movies together! Their first movie together was Kiddy Grade II: Maelstrom (2007) while their highest rated movie together was The Extravaganza of Haruhi Suzumiya (2007). They have not worked together since The Disappearance of Haruhi Suzumiya (2010). They are most known for their animation films together.