How many movies have Takehito Koyasu and Tatsuhiro Ariyoshi collaborated on?

They have worked on 1 movie together! Their first movie together was Fate/Grand Order the Movie: Divine Realm of the Round Table: Camelot Wandering; Agateram (2020) and was their highest rated movie together. They have not worked together since Fate/Grand Order the Movie: Divine Realm of the Round Table: Camelot Wandering; Agateram (2020).