How many movies have Takako Takahashi and Yasumasa Koyama collaborated on?

They have worked on 2 movies together! Their first movie together was Non Non Biyori: Vacation (2018) 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).