| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Junya•Koga | |
| Used name | Junya•Koga | |
| Original name | 古賀•淳也 | |
| Born | 19 July 1987 in Kumagaya, Saitama | |
| Measurements | 181 cm / 80 kg | |
| Affiliations | Daiichi Sankyo (JPN) / Club Wolverine (USA) | |
| NOC | Japan |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2016 Summer Olympics | Swimming (Aquatics) | Junya Koga | ||||
| 4 × 100 metres Freestyle Relay, Men (Olympic) | Japan | 8 |