How many movies have Yoshihiko Umakoshi and Yumi Kobayashi collaborated on?

They have worked on 4 movies together! Their first movie together was Yes! Precure 5 Go Go! Movie: Happy Birthday in the Land of Sweets (2008) while their highest rated movie together was Dou kyu sei – Classmates (2016). They have not worked together since Dou kyu sei – Classmates (2016). They are most known for their animation films together.