How many movies have Hajime Okayasu and Toshiyuki Umeda collaborated on?

They have worked on 7 movies together! Their first movie together was Doraemon: Nobita and the Spiral City (1997) while their highest rated movie together was Doraemon: Nobita and the Legend of the Sun King (2000). They have not worked together since Crayon Shin-chan: Invoke a Super Storm! The Hero of Kinpoko (2008). They are most known for their animation films together.