| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Manabu•Koga |
| Used name | Manabu•Koga |
| Original name | 古賀•学 |
| Born | 5 April 1935 |
| Died | 18 May 1974 |
| Affiliations | Waseda University, Tokyo (JPN) |
| NOC | Japan |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1956 Summer Olympics | Swimming (Aquatics) | JPN |
Manabu Koga | |||
| 100 metres Freestyle, Men (Olympic) | =10 | |||||
| 4 × 200 metres Freestyle Relay, Men (Olympic) | Japan | 4 |