How many movies have Hajime Okayasu and Nobuo Numai collaborated on?

They have worked on 6 movies together! Their first movie together was Doraemon: Nobita's Diary on the Creation of the World (1995) 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 science fiction films together.