How many movies have Aki Mukai and Yoshihiko Umakoshi collaborated on?

They have worked on 1 movie together! Their first movie together was Futari wa Precure Splash☆Star Tic-Tac Crisis Hanging by a Thin Thread! (2006) and was their highest rated movie together. They have not worked together since Futari wa Precure Splash☆Star Tic-Tac Crisis Hanging by a Thin Thread! (2006).