How many movies have Junko Takeuchi and Yasuyuki Kai collaborated on?

They have worked on 4 movies together! Their first movie together was Naruto the Movie: Guardians of the Crescent Moon Kingdom (2006) 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.