How many movies have Hajime Okayasu and Sanae Matsutani collaborated on?

They have worked on 4 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 Legend of the Sun King (2000). They are most known for their family films together.