How many movies have Atsuko Otani and Mika Okubo collaborated on?

They have worked on 3 movies together! Their first movie together was Naruto Shippuden the Movie: Bonds (2008) while their highest rated movie together was Boruto: Naruto the Movie (2015). They have not worked together since Boruto: Naruto the Movie (2015). They are most known for their fantasy films together.