How many movies have Fujiko F. Fujio and Nobuyo Oyama collaborated on?

They have worked on 27 movies together! Their first movie together was Doraemon: Nobita's Dinosaur (1980) while their highest rated movie together was Dorami-chan: Wow, The Kid Gang of Bandits / The☆Doraemons: Strange, Sweets, Strange? / Doraemon: Nobita's the Night Before a Wedding (1991). They have not worked together since Doraemon: Nobita in the Wan-Nyan Spacetime Odyssey (2004). They are most known for their family films together.