How many movies have Takao Sano and Tetsuya Nishio collaborated on?

They have worked on 3 movies together! Their first movie together was Naruto the Movie: Guardians of the Crescent Moon Kingdom (2006) while their highest rated movie together was Naruto Shippuden the Movie: The Will of Fire (2009). They have not worked together since Naruto Shippuden the Movie: Blood Prison (2011). They are most known for their action films together.