Jamie will partner James Hook at Centre, whilst Rhys Thomas features in an entirely new front row from the team which faced Australia, with Duncan Jones and Chris Horsman either side of him.

Martyn Williams, Gethin Jenkins and Tom Shanklin are named amongst the replacements.

Wales will have had only five days to get over their bruising 20-32 defeat to Australia and with that in mind Jenkins has used the opportunity to give fresh legs a run against Japan.

The partnership of Phillips, Stephen Jones and James Hook will be of particular interest to Jenkins who has been dealt a blow with injuries to Gareth Thomas and Sonny Parker.

"A number of players will be itching to get out there and make their mark on this World Cup, said Jenkins.

"We have the strength in a number of positions to allow us to re-assess form and grow the experience in our squad.

Meanwhile, Japan coach John Kirwan has named his team to face Wales.

Kirwan has made two changes from the defeat against Fiji with Tongan-born Christian Loamanu switching from wing to full-back instead of the injured Go Aruga. Hirotoki Onozawa comes in on the wing.

Wales: Kevin Morgan; Dafydd James, Jamie Robinson, James Hook, Shane Williams; Stephen Jones, Mike Phillips; Duncan Jones, Rhys Thomas, Chris Horsman, Will James, Alun Wyn Jones, Jonathan Thomas, Colin Charvis, Alix Popham.
Replacements: Huw Bennett, Gethin Jenkins, Ian Evans, Martyn Williams, Gareth Cooper, Ceri Sweeney, Tom Shanklin

Japan: Christian Loamanu; Kosuke Endo, Yuta Imamura, Shotaro Onishi, Hirotoki Onozawa; Bryce Robins, Tomoki Yoshida; Takuro Miuchi (capt), Philip O'Reilly, Hare Makiri; Luke Thompson, Hitoshi Ono; Soma Tomokazu, Yuji Matsubara, Tatsukishi Nishiura.
Replacements: Taku Inokuchi, Ryo Yamamura, Takanori Kumagae, Yasunori Watanabe, Kim Chul-won, Koji Taira, Tatsuya Kusumi.