How many movies have Shu Watanabe and Tetsuya Nishio collaborated on?

They have worked on 3 movies together! Their first movie together was Naruto Shippuden the Movie: The Lost Tower (2010) while their highest rated movie together was Road to Ninja: Naruto the Movie (2012). They have not worked together since Road to Ninja: Naruto the Movie (2012). They are most known for their action films together.