How many movies have Ayaka Minami and Yasumasa Koyama collaborated on?

They have worked on 6 movies together! Their first movie together was The Anthem of the Heart (2015) while their highest rated movie together was Sword Art Online the Movie – Progressive – Aria of a Starless Night (2021). They have not worked together since Sword Art Online the Movie – Progressive – Aria of a Starless Night (2021). They are most known for their animation films together.