How many movies have Mariko Kawanishi and Yumi Kakazu collaborated on?

They have worked on 8 movies together! Their first movie together was Doraemon: The New Record of Nobita's Spaceblazer (2009) while their highest rated movie together was Doraemon: Nobita and the New Steel Troops: Winged Angels (2011). They are most known for their adventure films together.