| Swimming |
2002 Pan Pacific Swimming Championships |
Yokohama |
 JPN |
200 m Backstroke, Men |
4 |
JPN |
|
| Swimming |
2002 Pan Pacific Swimming Championships |
Yokohama |
JPN |
100 m Backstroke, Men |
11 |
JPN |
|
| Swimming |
2002 Asian Games |
Busan |
 KOR |
200 m Backstroke, Men |
🥈 |
JPN |
|
| Swimming |
2003 Summer Universiade |
Daegu |
KOR |
200 m Backstroke, Men |
🥈 |
JPN |
|
| Swimming |
2004 World Swimming Championships (25 m) |
Indianapolis |
 USA |
200 m Backstroke, Men |
4 |
JPN |
|
| Swimming |
2004 World Swimming Championships (25 m) |
Indianapolis |
USA |
100 m Individual Medley, Men |
22 |
JPN |
|
| Swimming |
2004 World Swimming Championships (25 m) |
Indianapolis |
USA |
4 x 100 m Medley Relay, Men |
6 |
JPN |
|
| Swimming |
2004 World Swimming Championships (25 m) |
Indianapolis |
USA |
100 m Backstroke, Men |
9 |
JPN |
|
| Swimming |
2004 World Swimming Championships (25 m) |
Indianapolis |
USA |
50 m Backstroke, Men |
14 |
JPN |
|
| Swimming |
2005 Swim World Cup |
Daejon |
KOR |
200 m Backstroke, Men |
🥉 |
JPN |
|
| Swimming |
2005 World Aquatics Championships |
Montréal |
 CAN |
200 m Backstroke, Men |
5 |
JPN |
|
| Swimming |
2005 Summer Universiade |
İzmir |
 TUR |
200 m Backstroke, Men |
🥈 |
JPN |
|
| Swimming |
2005 East Asian Games |
Macau |
 MAC |
100 m Backstroke, Men |
🥈 |
JPN |
|
| Swimming |
2005 East Asian Games |
Macau |
MAC |
200 m Backstroke, Men |
🥈 |
JPN |
|
| Swimming |
2005 East Asian Games |
Macau |
MAC |
4 x 100 m Medley Relay, Men |
🥈 |
JPN |
|
| Swimming |
2006 Swim World Cup |
Daejon |
KOR |
200 m Backstroke, Men |
🥉 |
JPN |
|
| Swimming |
2006 Asian Games |
Doha |
 QAT |
200 m Backstroke, Men |
🥉 |
JPN |
|
| Swimming |
2007 Summer Universiade |
Bangkok |
 THA |
200 m Backstroke, Men |
🥈 |
JPN |
|
| Swimming |
2009 World Aquatics Championships |
Roma |
 ITA |
200 m Backstroke, Men |
12 |
JPN |
|