How many movies have Nobuo Numai and Nobuyo Oyama collaborated on?

They have worked on 9 movies together! Their first movie together was Doraemon: Nobita's Dinosaur (1980) while their highest rated movie together was Doraemon: Nobita and the Galaxy Super-express (1996). They have not worked together since Doraemon: Nobita and the Windmasters (2003). They are most known for their family films together.