Portugal, meanwhile, emerged champions for the second time following their 6-4 victory over Italy in the final, while Japan captain Ozu Moreira was awarded the Golden Ball for his exceptional form throughout the tournament.

All of Portugal’s goals came from brothers Be and Leo Martins, with the former scoring a decisive double in the third period.

Japan will face Portugal, who defeated Senegal 4-2 in their last eight match, in the semi-finals on Saturday.

The other semi-final will see Russia, who came from behind to shock defending champions Brazil 4-3, playing Italy. The Italians defeated Switzerland 5-4 in their last eight tie.

Japan were confident from the start, having secured a top two finish in Group A, after beating Paraguay and USA in their earlier matches.

It was Japan's second successive win and sealed their place in the knockout stage, with the Asian champions having defeated Paraguay 5-4 in their opener on Thursday.

Japan will play Switzerland, who edged Paraguay 7-6 in extra-time, on Monday with the East Asian side only needing a draw to win the group.

Both sides played a patient game and neither was able to break the stalemate in the first period.

That changed 48 seconds into the second period as Masanori Okuyama broke the deadlock in style, before Ozu Moreira doubled Asian champions Japan's lead in the 16th minute.

The 2015 champions, Portugal, were made to sweat, though, as both sides exchanged goals in the first period through Coimbra’s penalty in the fifth minute, before Oman's Jalal Al Sinani equalised with a free header four minutes later.

Be Martins scored the only goal of the second period and it was a beauty. The diminutive and skilful player hit a blistering shot into the top corner from distance, with Oman’s Younis Al Owaisi left helpless in the 21st minute.