How many movies have Haruo Okuno and Tetsuya Nishio collaborated on?

They have worked on 3 movies together! Their first movie together was Naruto Shippuden the Movie: The Will of Fire (2009) while their highest rated movie together was Naruto Shippuden the Movie: Blood Prison (2011). They have not worked together since Miss Hokusai (2015). They are most known for their animation films together.