How many movies have Daiki Sugiyama and Keisuke Watanabe collaborated on?

They have worked on 5 movies together! Their first movie together was Naruto Shippuden the Movie: The Will of Fire (2009) while their highest rated movie together was Love Live! The School Idol Movie (2015). They have not worked together since Love Live! Sunshine!! The School Idol Movie Over the Rainbow (2019). They are most known for their animation films together.