How many movies have Akira Matsui and Kazuhiko Inoue collaborated on?

They have worked on 4 movies together! Their first movie together was Mobile Suit Zeta Gundam - A New Translation I: Heir to the Stars (2005) while their highest rated movie together was Boruto: Naruto the Movie (2015). They have not worked together since Boruto: Naruto the Movie (2015). They are most known for their animation films together.