| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Katsumasa•Onishi |
| Used name | Katsumasa•Onishi |
| Original name | 大西•克昌 |
| Born | 21 October 1959 in Nara, Nara (JPN) |
| Measurements | 169 cm / 70 kg |
| NOC | Japan |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1992 Summer Olympics | Shooting | JPN |
Katsumasa Onishi | |||
| Rapid-Fire Pistol, 25 metres, Men (Olympic) | =22 |