A brace from Jacob Murphy helped United record a resounding victory, with Alexander Isak and Lewis Hall also on target for the Magpies - while goalkeeper Nick Pope saved a first half penalty from Atsuki Ito.
Eddie Howe's side - who will now get set to take on Yokohama F. Marinos on Saturday - were backed by a passionate local and travelling contingent at the Saitama Stadium, and Serena Taylor and Harriet Massey were both there to bring newcastleunited.com this gallery.