How many movies have Yasunari Usuda and Yuichiro Nakajima collaborated on?

They have worked on 4 movies together! Their first movie together was Road to Ninja: Naruto the Movie (2012) while their highest rated movie together was Love Live! The School Idol Movie (2015). They have not worked together since Case Closed: The Crimson Love Letter (2017). They are most known for their animation films together.