How many movies have Aiko Kasumi and Hiroyuki Horiuchi collaborated on?

They have worked on 3 movies together! Their first movie together was Ghost in the Shell: Stand Alone Complex - Solid State Society (2006) 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.