How many movies have Mika Doi 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 One Piece Film: Z (2012). They have not worked together since One Piece Film Red (2022). They are most known for their fantasy films together.