How many movies have Hirotsugu Kawasaki and Yōichi Masukawa collaborated on?

They have worked on 4 movies together! Their first movie together was Naruto the Movie: Guardians of the Crescent Moon Kingdom (2006) 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.