How many movies have Mashu Inoue and Satomi Nishio collaborated on?

They have worked on 4 movies together! Their first movie together was Fate/kaleid liner Prisma☆Illya: Prisma☆Phantasm (2019) while their highest rated movie together was Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020). They have not worked together since Fate/kaleid liner Prisma☆Illya: Licht Nameless Girl (2021). They are most known for their animation films together.