Japan romped to an emphatic 4-1 away win against Germany in an international friendly on Saturday, beating the four-time World Cup winner again following its famous 2-1 triumph at the tournament in Qatar last November.

Junya Ito's opener was canceled out by Leroy Sane before Ayase Ueda gave the Samurai Blue a 2-1 lead at the break at Volkswagen Arena, with two late goals, both set up by substitute Takesufa Kubo, sealing the tie and potentially the fate of beleaguered Germany manager Hansi Flick, nine months out from Germany hosting the European Championships.

A "brutally disappointed" Flick refused to back down after the game.