125 Cc Classification
| Pos | Rider | Manufacturer | Laps | Time | Grid | Points |
|---|---|---|---|---|---|---|
| 1 | Noboru Ueda | Honda | 16 | 38:26.905 | 1 | 20 |
| 2 | Fausto Gresini | Honda | 16 | +2.553 | 3 | 17 |
| 3 | Loris Capirossi | Honda | 16 | +8.676 | 2 | 15 |
| 4 | Masato Shima | Honda | 16 | +15.917 | 10 | 13 |
| 5 | Jorge Martínez | JJ Cobas | 16 | +33.737 | 11 | |
| 6 | Heinz Lüthi | Honda | 16 | +37.389 | 11 | 10 |
| 7 | Ralf Waldmann | Honda | 16 | +37.546 | 9 | |
| 8 | Akira Saitoh | Honda | 16 | +38.930 | 12 | 8 |
| 9 | Soichiro Sato | Honda | 16 | +39.174 | 15 | 7 |
| 10 | Adolf Stadler | JJ Cobas | 16 | +39.327 | 5 | 6 |
| 11 | Gabriele Debbia | Aprilia | 16 | +39.380 | 13 | 5 |
| 12 | Nobuyuki Wakai | Honda | 16 | +39.425 | 4 | 4 |
| 13 | Yosuke Yamakawa | Honda | 16 | +45.178 | 8 | 3 |
| 14 | Gimmi Bosio | Honda | 16 | +47.160 | 2 | |
| 15 | Kinya Wada | Honda | 16 | +47.506 | 1 | |
| 16 | Hans Spaan | Honda | 16 | +47.883 | 7 | |
| 17 | Masayuki Hirose | Honda | 16 | +48.032 | ||
| 18 | Koji Takada | Honda | 16 | +54.478 | ||
| 19 | Hisashi Unemoto | Honda | 16 | +54.555 | ||
| 20 | Arie Molenaar | Honda | 16 | +1:03.982 | ||
| 21 | Dirk Raudies | Honda | 16 | +1:05.364 | ||
| 22 | Steve Patrickson | Honda | 16 | +1:06.647 | ||
| 23 | Hideaki Ueno | Honda | 16 | +1:06.674 | ||
| 24 | Julián Miralles | JJ Cobas | 16 | +1:06.892 | ||
| 25 | Alessandro Gramigni | Aprilia | 16 | +1:26.032 | ||
| 26 | Johnny Wickström | Honda | 16 | +1:30.576 | ||
| 27 | Robin Appleyard | Honda | 16 | +1:30.874 | ||
| 28 | Maurizio Vitali | Gazzaniga | 16 | +1:30.939 | ||
| 29 | Thierry Feuz | Honda | 16 | +1:32.191 | ||
| 30 | Olivier Petrucciani | Aprilia | 16 | +1:56.424 | ||
| 31 | Peter Galvin | Honda | 16 | +1:56.544 | ||
| 32 | Hubert Abold | Honda | 16 | +2:24.346 | ||
| 33 | Manuel Herreros | JJ Cobas | 15 | +1 lap | ||
| Ret | Ezio Gianola | Derbi | 13 | Retired | 14 | |
| Ret | Masafumi Ono | Honda | 13 | Retired | 9 | |
| Ret | Herri Torrontegui | JJ Cobas | 9 | Retired | ||
| Ret | Bruno Casanova | Honda | 6 | Retired | 6 | |
| Ret | Alfred Waibel | Honda | 6 | Retired | ||
| Ret | Kazuto Sakata | Honda | 5 | Retired | ||
| Ret | Emilio Cuppini | Gazzaniga | 2 | Retired | ||
Read more about this topic: 1991 Japanese Motorcycle Grand Prix