Gran Premio de Japón de Motociclismo de 2005
# Gran Premio de Japón de Motociclismo de 2005

El Gran Premio de Japón de Motociclismo de 2005 fue la duodécima prueba del Campeonato del Mundo de Motociclismo de 2005. Tuvo lugar en el fin de semana del 16 al 18 de septiembre de 2005 en el Twin Ring Motegi, situado en Motegi, Prefectura de Tochigi, Japón. La carrera de MotoGP fue ganada por Loris Capirossi, seguido de Max Biaggi y Makoto Tamada. Hiroshi Aoyama ganó la prueba de 250cc, por delante de Dani Pedrosa y Casey Stoner. La carrera de 125cc fue ganada por Mika Kallio, Thomas Lüthi fue segundo y Héctor Faubel tercero.

# Gran Premio de Japón de Motociclismo de 2005
## Resultados MotoGP

| Pos | Piloto | Constructor | Tiempo/Retirado | Grilla | Puntos |
| 1 | Loris Capirossi | Ducati | 43:30.499 | 1 | 25 |
| 2 | Max Biaggi | Honda | +1.479 | 5 | 20 |
| 3 | Makoto Tamada | Honda | +16.227 | 4 | 16 |
| 4 | Carlos Checa | Ducati | +22.148 | 9 | 13 |
| 5 | John Hopkins | Suzuki | +33.212 | 2 | 11 |
| 6 | Colin Edwards | Yamaha | +34.915 | 13 | 10 |
| 7 | Nicky Hayden | Honda | +45.894 | 6 | 9 |
| 8 | Kenny Roberts Jr | Suzuki | +56.498 | 8 | 8 |
| 9 | Toni Elías | Yamaha | +1:12.037 | 17 | 7 |
| 10 | Ruben Xaus | Yamaha | +1:34.927 | 19 | 6 |
| 11 | Franco Battaini | Blata | +1 Lap | 20 | 5 |
| Ret | Valentino Rossi | Yamaha | Retirement | 11 | |
| Ret | Marco Melandri | Honda | Retirement | 3 | |
| Ret | Alex Barros | Honda | Retirement | 10 | |
| Ret | Sete Gibernau | Honda | Retirement | 7 | |
| Ret | Shinya Nakano | Kawasaki | Retirement | 14 | |
| Ret | Tohru Ukawa | Honda | Retirement | 15 | |
| Ret | Alex Hofmann | Kawasaki | Retirement | 12 | |
| Ret | Roberto Rolfo | Ducati | Retirement | 16 | |
| Ret | Naoki Matsudo | Moriwaki | Retirement | 18 | |

# Gran Premio de Japón de Motociclismo de 2005
## Resultados 250cc

| Pos | Piloto | Constructor | Tiempo/Retirado | Grilla | Puntos |
| 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 | Martín Cárdenas | 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 | |

# Gran Premio de Japón de Motociclismo de 2005
## Resultados 125cc

| Pos | Piloto | Constructor | Tiempo/Retirado | Grilla | Puntos |
| 1 | Mika Kallio | KTM | 30:10.854 | 5 | 25 |
| 2 | Thomas Lüthi | Honda | +0.111 | 7 | 20 |
| 3 | Héctor Faubel | Aprilia | +1.517 | 6 | 16 |
| 4 | Tomoyoshi Koyama | Honda | +2.349 | 2 | 13 |
| 5 | Mattia Pasini | Aprilia | +2.406 | 3 | 11 |
| 6 | Manuel Poggiali | Gilera | +2.619 | 8 | 10 |
| 7 | Sergio Gadea | Aprilia | +2.761 | 10 | 9 |
| 8 | Pablo Nieto | Derbi | +2.961 | 13 | 8 |
| 9 | Álvaro Bautista | Honda | +3.720 | 9 | 7 |
| 10 | Fabrizio Lai | Honda | +9.936 | 14 | 6 |
| 11 | Mike Di Meglio | Honda | +14.546 | 12 | 5 |
| 12 | Aleix Espargaró | Honda | +14.693 | 24 | 4 |
| 13 | Andrea Iannone | Aprilia | +15.699 | 19 | 3 |
| 14 | Toshihisa Kuzuhara | Honda | +20.833 | 20 | 2 |
| 15 | Enrique Jerez | Derbi | +22.562 | 17 | 1 |
| 16 | Raffaele de Rosa | Aprilia | +24.038 | 22 | |
| 17 | Lorenzo Zanetti | Aprilia | +25.907 | 18 | |
| 18 | Joan Olivé | Aprilia | +27.014 | 27 | |
| 19 | Manuel Hernández | Aprilia | +27.502 | 26 | |
| 20 | Alexis Masbou | Honda | +27.548 | 21 | |
| 21 | Imre Tóth | Aprilia | +47.987 | 25 | |
| 22 | Hirokaki Kuzuhara | Honda | +48.337 | 31 | |
| 23 | Federico Sandi | Honda | +48.524 | 34 | |
| 24 | Yuki Hamamoto | Honda | +51.086 | 32 | |
| 25 | Takumi Takahashi | Honda | +53.530 | 29 | |
| 26 | Arata Mori | Honda | +53.610 | 33 | |
| 27 | Vincent Braillard | Aprilia | +54.652 | 38 | |
| 28 | Karel Abraham | Aprilia | +55.454 | 30 | |
| 29 | Kazuki Hanafusa | Honda | +1:03.564 | 41 | |
| 30 | Jordi Carchano | Aprilia | +1 Lap | 36 | |
| Ret | Gábor Talmácsi | KTM | Retirement | 1 | |
| Ret | Lukáš Pešek | Derbi | Retirement | 23 | |
| Ret | Dario Giuseppetti | Aprilia | Retirement | 28 | |
| Ret | Sascha Hommel | Malaguti | Retirement | 40 | |
| Ret | Marco Simoncelli | Aprilia | Retirement | 4 | |
| Ret | Mateo Túnez | Aprilia | Retirement | 15 | |
| Ret | Hiroomi Iwata | Honda | Retirement | 35 | |
| Ret | Michele Pirro | Malaguti | Retirement | 37 | |
| Ret | Sandro Cortese | Honda | Retirement | 16 | |
| Ret | Julián Simón | KTM | Retirement | 11 | |
| Ret | David Bonache | Honda | Retirement | 39 | |