250cc Classification
| Pos | Rider | Manufacturer | Time/Retired | Grid | Points |
|---|---|---|---|---|---|
| 1 | Hiroshi Aoyama | Honda | 43:52.454 | 1 | 25 |
| 2 | Dani Pedrosa | Honda | +5.313 | 7 | 20 |
| 3 | Casey Stoner | Aprilia | +7.781 | 9 | 16 |
| 4 | Yuki Takahashi | Honda | +10.222 | 6 | 13 |
| 5 | Randy de Puniet | Aprilia | +10.763 | 8 | 11 |
| 6 | Andrea Dovizioso | Honda | +11.054 | 5 | 10 |
| 7 | Alex de Angelis | Aprilia | +19.199 | 4 | 9 |
| 8 | Héctor Barberá | Honda | +24.665 | 13 | 8 |
| 9 | Alex Debón | Honda | +37.683 | 16 | 7 |
| 10 | Sylvain Guintoli | Aprilia | +38.122 | 11 | 6 |
| 11 | Simone Corsi | Aprilia | +38.194 | 24 | 5 |
| 12 | Steve Jenkner | Aprilia | +53.211 | 15 | 4 |
| 13 | Mirko Giansanti | Aprilia | +56.364 | 21 | 3 |
| 14 | Alex Baldolini | Aprilia | +1:08.640 | 27 | 2 |
| 15 | Radomil Rous | Honda | +1:09.205 | 22 | 1 |
| 16 | Kouki Takahashi | Honda | +1:17.982 | 28 | |
| 17 | Martin Cardenas | Aprilia | +1:25.096 | 29 | |
| 18 | Dirk Heidolf | Honda | +1:26.088 | 20 | |
| 19 | Mamoru Akiya | Yamaha | +1:33.286 | 30 | |
| 20 | Masaki Tokudome | Yamaha | +1:35.598 | 25 | |
| 21 | Mathieu Gines | Aprilia | +1:37.552 | 32 | |
| Ret | Jorge Lorenzo | Honda | Retirement | 2 | |
| Ret | Taro Sekiguchi | Aprilia | Retirement | 12 | |
| Ret | Andrea Ballerini | Aprilia | Retirement | 26 | |
| Ret | Sebastián Porto | Aprilia | Retirement | 10 | |
| Ret | Chaz Davies | Aprilia | Retirement | 23 | |
| Ret | Shuhei Aoyama | Honda | Retirement | 3 | |
| Ret | Anthony West | KTM | Retirement | 14 | |
| Ret | Ryuji Yokoe | Yamaha | Retirement | 18 | |
| Ret | Jakub Smrž | Honda | Retirement | 19 | |
| Ret | Arnaud Vincent | Fantic | Retirement | 31 | |
| Ret | Roberto Locatelli | Aprilia | Retirement | 17 |
Read more about this topic: 2005 Japanese Motorcycle Grand Prix