| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Yuki•Yamaguchi | |
| Used name | Yuki•Yamaguchi | |
| Original name | 山口•有希 | |
| Born | 22 February 1984 in Maizuru, Kyoto |  JPN |
| Measurements | 174 cm / 63 kg | |
| Affiliations | Tokai University (JPN) | |
| NOC | Japan | JPN |
Personal Best: 400 – 45.18 (2003).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2004 Summer Olympics | Athletics | JPN |
Yuki Yamaguchi | |||
| 400 metres, Men (Olympic) | 5 h7 r1/3 | |||||
| 4 × 400 metres Relay, Men (Olympic) | Japan | 4 |
