Doraemon: Kaette Kita Doraemon (Movie)

Synopsis

Nobita is running from an angry Gian, though is quickly able to escape when Gian trips. Nobita asks Doraemon for a gadget to fight back, but Doraemon instead snaps at him; Doraemon tells Nobita that he must return to the 22nd century, and won’t be returning. (Source: Doraemon Wiki)