How many movies have Chika Hirabuki and Hiroaki Hirata collaborated on?

They have worked on 4 movies together! Their first movie together was Fullmetal Alchemist the Movie: The Sacred Star of Milos (2011) while their highest rated movie together was Sword Art Online: The Movie – Ordinal Scale (2017). They have not worked together since maboroshi (2023). They are most known for their fantasy films together.