How many movies have Aiko Kasumi and Asami Hayakawa collaborated on?

They have worked on 3 movies together! Their first movie together was Professor Layton and the Eternal Diva (2009) while their highest rated movie together was Maquia: When the Promised Flower Blooms (2018). They have not worked together since Maquia: When the Promised Flower Blooms (2018). They are most known for their animation films together.