How many movies have Kazuhiko Inoue and Yaiba collaborated on?

They have worked on 4 movies together! Their first movie together was Naruto Shippuden the Movie: The Lost Tower (2010) while their highest rated movie together was The Last: Naruto the Movie (2014). They have not worked together since Boruto: Naruto the Movie (2015). They are most known for their animation films together.