Yuki Yamaguchi Achievements Achievements

| Year_ | Tournament | Venue | Result_ | Extra |
|---|---|---|---|---|
| 2002 | World Junior Championships | Kingston , Jamaica | 3rd | 4x100 m relay |
| 2003 | Asian Championships | Manila , Philippines | 3rd | 400 m |
| 2004 | Olympic Games | Athens , Greece | 4th | 4x400 m relay |
| 2005 | Universiade | Izmir , Turkey | 3rd | 400 m |
| 2005 | Universiade | Izmir , Turkey | 2nd | 4x400 m relay |
| 2006 | Asian Games | Doha , Qatar | 6th | 400 m |