How many movies have Natsuko Inoue and Shinya Takahashi collaborated on?

They have worked on 3 movies together! Their first movie together was Fate/stay night: Heaven's Feel II. Lost Butterfly (2019) while their highest rated movie together was Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020). They have not worked together since Pompo the Cinephile (2021). They are most known for their animation films together.