Japan will remain winless, and unless Canada beat Australia, they will too, after the teams fought out a thrilling 12-12 draw on Tuesday.
Wales bounced back from the loss to Australia by recording an emphatic 72-18 victory over Japan in Pool B in Cardiff on Thursday evening.
Fiji, like many others, got their World Cup off to a stuttery start on Wednesday, beating Japan 35-31 in a pulsating clash in Toulouse.
Australia hit the 2007 World Cup running on Saturday, with a comprehensive 91-3 win over Japan in their Pool B clash in Lyon.
Italy had to work hard to beat a disciplined Japan team 36-12 in a World Cup warm-up on Saturday.
