How many movies have Banjo Ginga and Harumi Kawaguchi collaborated on?

They have worked on 1 movie together! Their first movie together was Doraemon: Nobita's New Great Adventure Into the Underworld - The Seven Magic Users (2007) and was their highest rated movie together. They have not worked together since Doraemon: Nobita's New Great Adventure Into the Underworld - The Seven Magic Users (2007).