Out to prove they had not lost their attacking edge after Saturday's defeat by Australia, Wales scored 11 tries in their World Cup Pool B match at the Millennium Stadium.

"It was a job well done tonight," Jenkins said.

"There were a lot of pleasing things ... but there are still areas we are going to look at tomorrow."

Handling errors gave Japan the chance for two counter-attack tries and there were plenty of others messy moments that Wales were lucky not to have been punished for.

Stephen Jones, captain in the absence of the injured Gareth Thomas, said he was pleased with the way Wales had attacked but also conceded there were problem areas that needed attention before the Fiji match which looks likely to be a showdown for a quarter-final berth.

"I was very happy with the way the team played tonight, I thought we were played a very good attacking game, yes in the first half we made a few errors. There are areas to work on," he said.

Jenkins praised wing Shane Williams, who marked his 50th cap with two tries.

"He's getting better with age. It's great for him and it's great for us," he said.

The team would return to France feeling confident, said Jenkins, but before they started training for the Fiji clash they would have a couple of days off.

"We go back confident and we go back excited for the Fiji game," said Jenkins. "Fiji are going to be a threat."

Australia, Wales, who have played a game more, and Fiji all have 10 points with the Wallabies favourites to secure top spot.

The runners-up look likely to face South Africa in the quarter-finals if the rest of the games go to form.

Japan's remaining goals for the tournament are more modest, with coach John Kirwan saying they wanted simply to take one victory home with them, against Canada next week.

"It's very important we finish this World Cup on a high," he said. "We've seen a big improvement."