How many movies have Chika Hirabuki and Naoko Yamada collaborated on?

They have worked on 6 movies together! Their first movie together was Sword Art Online: The Movie – Ordinal Scale (2017) while their highest rated movie together was Maquia: When the Promised Flower Blooms (2018). They have not worked together since maboroshi (2023). They are most known for their animation films together.