How many movies have Hisao Egawa and Maiko Okada collaborated on?

They have worked on 1 movie together! Their first movie together was Doraemon: Nobita in the Wan-Nyan Spacetime Odyssey (2004) and was their highest rated movie together. They have not worked together since Doraemon: Nobita in the Wan-Nyan Spacetime Odyssey (2004).