How many movies have BUNBUN and Yasumasa Koyama collaborated on?

They have worked on 4 movies together! Their first movie together was Sword Art Online: The Movie - Ordinal Scale (2017) 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 – Scherzo of Deep Night (2022). They are most known for their action films together.