How many movies have Seimei Kidokoro and Takahiro Sakurai collaborated on?

They have worked on 3 movies together! Their first movie together was Knights of Sidonia: The Movie (2015) while their highest rated movie together was Fireworks (2017). They have not worked together since Haikara-san: Here Comes Miss Modern Part 2 (2018). They are most known for their animation films together.