| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Kazumasa•Hirai |
| Used name | Kazumasa•Hirai |
| Original name | 平井•一正 |
| Born | 21 November 1949 in ?, Okayama (JPN) |
| Measurements | 156 cm / 60 kg |
| NOC | Japan |
| Medals | OG |
| Gold | 0 |
| Silver | 0 |
| Bronze | 1 |
| Total | 1 |
Kazumasa Hirai had the following podium finishes at major championships: 3rd in the 1976 Olympics Featherweight class (275.0 kg); 3rd in the 1976 World Championships Featherweight class (275.0 kg); 1st in the 1974 Asian Games Featherweight class; 1st in the 1978 Asian Games Middleweight class. He set one featherweight world record in the snatch.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1976 Summer Olympics | Weightlifting | JPN |
Kazumasa Hirai | |||
| Featherweight, Men (Olympic) | 3 | Bronze |