How many movies have Seiko Asai and Takahiko Yoshida collaborated on?

They have worked on 4 movies together! Their first movie together was Brave Story (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 animation films together.