| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Koichi•Oshima | |
| Used name | Koichi•Oshima | |
| Original name | 大島•公一 | |
| Born | 17 June 1967 in Itabashi, Tokyo |  JPN |
| Measurements | 165 cm / 65 kg | |
| NOC | Japan | JPN |
| Medals | OG |
| Gold | 0 |
| Silver | 0 |
| Bronze | 1 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1992 Summer Olympics | Baseball (Baseball/Softball) | JPN |
Koichi Oshima | |||
| Baseball, Men (Olympic) | Japan | 3 | Bronze |
