How many movies have Mitsuru Sōma and Yoshiko Kuwano collaborated on?

They have worked on 3 movies together! Their first movie together was Go! Anpanman: When the Flower of Courage opens (1999) 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.