| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Hidehachi•Koyasu |
| Used name | Hidehachi•Koyasu |
| Original name | 子安•英八 |
| Born | 2 January 1960 |
| Measurements | 171 cm / 67 kg |
| NOC |  Japan |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1984 Summer Olympics | Fencing | JPN |
Hidehachi Koyasu | |||
| Foil, Team, Men (Olympic) | Japan | 9 |
