The hosts will face South Africa in the last eight after a brilliant and poignant victory over Scotland, hours after Typhoon Hagibis ripped through the country.
Japan's decisive Pool A match with Scotland at the Rugby World Cup will go ahead as planned at Yokohama Stadium on Sunday night.
Scottish Rugby Union chief executive Mark Dodson said he is ready to launch a legal challenge to prevent World Cup organisers cancelling his country's game against Japan.
Japan coach Jamie Joseph feels his side's achievements are being "undermined" by the speculation over whether Sunday's game against Scotland will go ahead.
Samoa coach Steve Jackson said he was left bewildered by some of the refereeing decisions during his side's defeat to Japan.
The Rugby World Cup hosts defeated Samoa to set up a probable elimination game against Scotland next Sunday in their final pool match.
Japan's 19-12 World Cup win over Ireland may have stunned the rugby world on Saturday but one man claimed that he was not surprised -- Ireland coach Joe Schmidt.
Jamie Joseph praised the courage of his Japan players after a momentous victory over Ireland, saying they had been preparing for the match for three years.
The Rugby World Cup is alive and kicking and World Rugby has Japan to thank. Again.
The tournament hosts have beaten the world's No.1 ranked team, eclipsing even their 2015 victory over South Africa as the greatest shock in Rugby World Cup history.
Any thought that the tournament's first foray into Asia wouldn't be embraced by the people of Japan was blown away on opening night.
Winger Kotaro Matsushima scored a hat-trick as Japan overcame a severe case of opening-night nerves to give the host nation a winning start to the Rugby World Cup.
On the eve of the Rugby World Cup, Tom Hamilton assesses how far the game has come and how far it still has to go in its understanding of the most prevalent -- and damaging -- injury in rugby.
Everything happens earlier in Super Rugby next year in changes that SANZAAR hopes will make the faltering product more successful in the Australian marketplace.
South Africa post a comfortable 41-7 victory over Japan in their final Rugby World Cup warm-up match, laying down a tournament marker and gaining revenge for defeat four years ago.
Both sides have described the match in the World Cup host city of Kumagaya as "tournament preparation", but the events in Brighton four years ago have dominated the build-up.
Siya Kolisi has been named in a strong Springbok squad to face Japan in a World Cup warm-up match.
Luke Thompson will play at a fourth Rugby World Cup after being included in hosts Japan's squad for the tournament.
Six weeks out from hosting the Rugby World Cup, Japan enjoyed a timely confidence boost by winning the Pacific Nations Cup against the United States.
Japan need to find a replacement for competing in Super Rugby following Sunwolves' expulsion if they are to become a major rugby power, former Brave Blossoms coach Eddie Jones has said.
Japan captain Michael Leitch has accused some top tier nations of wanting to keep high level rugby to themselves, after the Sunwolves were told they would be cut from Super Rugby after the 2020 season.
The Sunwolves secured their first ever road win in stylish fashion downing the Chiefs 30-15 in Hamilton to end their 23-match losing run away from home.
The fixture will afford the Springboks a further opportunity to conditions in Japan, where the team has never previously played.
England coach Eddie Jones said his team needed a change in attitude to turn around Saturday's test against Japan.
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- JPN11thTries Scored 1st South Africa : 27 Tries ScoredSA1st1327
- JPN8thPoints Difference 1st South Africa : 149 Points DifferenceSA1st53149