How many movies have Takaaki Sekizaki and Toshiya Niidome collaborated on?

They have worked on 3 movies together! Their first movie together was The Boy Who Saw the Wind (2000) while their highest rated movie together was Naruto Shippuden the Movie: Blood Prison (2011). They have not worked together since Naruto Shippuden the Movie: Blood Prison (2011). They are most known for their animation films together.