TOKYO, 7 Oct -  Japan second-row Uwe Helu has warned his team-mates they need to raise their game to book their place in the quarter-finals.

The host nation will secure a last-eight spot with a win over Scotland in Yokohama on Sunday, but Helu is taking nothing for granted.

"What we've been doing well (so far) is not going to be good enough to win the game," he said. "We need to be great, make good preparation and focus on ourselves.

"Our goal was top eight and it's going to be a special week."

Tonga-born Helu had to wait for his World Cup chance after a knee injury delayed his participation until the hosts’ third match, their 38-19 victory over Samoa at the weekend.

But he has been playing a key role behind the scenes and on the training ground.

"We had to prepare the boys who were playing. We had to be physical (in training). We had to make sure they knew what was going to happen in the games and for the set-piece, lineouts, scrums," he said.

"I was a little bit disappointed not making the team but it was (the) coaching staff's choice. They thought that was our best team for the first two games.

"They showed what I needed to work on and asked (for) my body to be 100 per cent."

RNS mn/js/icr/ajr