How many movies have Masahito Yamashita and Shigeru Chiba collaborated on?

They have worked on 4 movies together! Their first movie together was Space Warriors Baldios (1981) while their highest rated movie together was Yu Yu Hakusho: Poltergeist Report (1994). They have not worked together since Doraemon: Nobita's Secret Gadget Museum (2013). They are most known for their animation films together.