How many movies have Mamiko Nakanishi and Manabu Nii 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 Dokidoki! Pretty Cure the Movie: Memories for the Future (2013). They have not worked together since Dokidoki! Pretty Cure the Movie: Memories for the Future (2013). They are most known for their animation films together.