| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Tadahiro•Kosaka |
| Used name | Tadahiro•Kosaka |
| Original name | 小坂•忠広 |
| Born | 10 February 1960 in ?, Wakayama (JPN) |
| Measurements | 179 cm / 65 kg |
| NOC | Japan |
Personal Bests: 20kmW – 1-27:03 (1988); 50kmW – 3-51:25 (1996).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1988 Summer Olympics | Athletics | JPN |
Tadahiro Kosaka | |||
| 20 kilometres Race Walk, Men (Olympic) | 47 | |||||
| 50 kilometres Race Walk, Men (Olympic) | 31 | |||||
| 1992 Summer Olympics | Athletics | JPN |
Tadahiro Kosaka | |||
| 50 kilometres Race Walk, Men (Olympic) | 24 | |||||
| 1996 Summer Olympics | Athletics | JPN |
Tadahiro Kosaka | |||
| 50 kilometres Race Walk, Men (Olympic) | 29 |