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| Country: | Japan |
| Birth Date: | 21-Feb-84 |
| Birthplace: | Tokyo, Japan |
| Residence: | Chiba, Japan |
| Plays: | R |
| Current rank for WC singles: | 1 |
| Current rank for WC doubles: | 2 |
| High rank for WC singles: | 1 |
| High rank date for WC singles: | 9-Oct-06 |
| High rank for WC doubles: | 1 |
| High rank date for WC doubles: | 21-May-07 |
| Career WC matches won: | 219 |
| Career WC matches lost: | 46 |
|
Bio information courtesy of
ITF Tennis| Grand Slam Singles Results: |
| Year | Event | Result |
| 2006 | US Open | SF |
| 2007 | Australian Open | Won |
| 2007 | Roland Garros | Won |
| 2007 | US Open | Won |
| 2008 | Australian Open | Won |
| 2008 | Roland Garros | Won |
| Grand Slam Doubles Results: |
| Year | Event | Result |
| 2006 | Wimbledon | Won |
| 2006 | US Open | RUP |
| 2007 | Australian Open | Won |
| 2007 | Roland Garros | RUP |
| 2007 | Wimbledon | RUP |
| 2007 | US Open | Won |
| 2008 | Australian Open | Won |
| 2008 | Roland Garros | Won |
Japan
