The 2011 Japanese motorcycle Grand Prix was the fifteenth round of the 2011 Grand Prix motorcycle racing season. It took place on the weekend of 29 September–2 October 2011 at the Twin Ring Motegi, located in Motegi, Japan. The Grand Prix, originally scheduled for 24 April, was moved to 2 October due to the effects of the Tōhoku earthquake and the Fukushima I nuclear accidents.

Due to concerns with possible radiation an independent survey of Motegi and the surrounding area was commissioned by FIM and Dorna Sports. That survey generated a preliminary report which stated "Based on the estimate dose it can be said by no doubt that the radiation risk during the race event is negligible." On 2 August the full report was received and the organisers stated that the race would take place as scheduled.

MotoGP classification Pos. No. Rider Team Manufacturer Laps Time/Retired Grid Points 1 26 Dani Pedrosa Repsol Honda Team Honda 24 42:47.481 4 25 2 1 Jorge Lorenzo Yamaha Factory Racing Yamaha 24 +7.299 2 20 3 27 Casey Stoner Repsol Honda Team Honda 24 +18.380 1 16 4 58 Marco Simoncelli San Carlo Honda Gresini Honda 24 +23.550 6 13 5 4 Andrea Dovizioso Repsol Honda Team Honda 24 +23.691 3 11 6 11 Ben Spies Yamaha Factory Racing Yamaha 24 +37.604 5 10 7 69 Nicky Hayden Ducati Team Ducati 24 +39.167 10 9 8 5 Colin Edwards Monster Yamaha Tech 3 Yamaha 24 +45.023 14 8 9 7 Hiroshi Aoyama San Carlo Honda Gresini Honda 24 +49.074 11 7 10 14 Randy de Puniet Pramac Racing Team Ducati 24 +59.022 13 6 11 35 Cal Crutchlow Monster Yamaha Tech 3 Yamaha 24 +1:13.964 12 5 12 64 Kousuke Akiyoshi LCR Honda MotoGP Honda 24 +1:21.709 16 4 13 72 Shinichi Ito Honda Racing Team Honda 24 +1:26.381 18 3 Ret 24 Toni Elías LCR Honda MotoGP Honda 17 Accident 15 Ret 19 Álvaro Bautista Rizla Suzuki MotoGP Suzuki 13 Accident 8 Ret 6 Damian Cudlin Pramac Racing Team Ducati 13 Accident 17 Ret 8 Héctor Barberá Mapfre Aspar Team MotoGP Ducati 1 Accident 9 Ret 46 Valentino Rossi Ducati Team Ducati 0 Collision 7 DNS 17 Karel Abraham Cardion AB Motoracing DucatiInjured Sources:

Moto2 classification

Pos. No. Rider Manufacturer Laps Time/Retired Grid Points 1 29 Andrea Iannone Suter 23 43:25.007 3 25 2 93 Marc Márquez Suter 23 +1.999 1 20 3 12 Thomas Lüthi Suter 23 +3.686 2 16 4 65 Stefan Bradl Kalex 23 +4.313 8 13 5 3 Simone Corsi FTR 23 +4.647 6 11 6 15 Alex de Angelis Motobi 23 +4.813 7 10 7 38 Bradley Smith Tech 3 23 +10.520 4 9 8 77 Dominique Aegerter Suter 23 +10.725 9 8 9 34 Esteve Rabat FTR 23 +11.387 17 7 10 36 Mika Kallio Suter 23 +12.803 12 6 11 19 Xavier Siméon Tech 3 23 +18.259 16 5 12 13 Anthony West MZ-RE Honda 23 +20.815 22 4 13 51 Michele Pirro Moriwaki 23 +23.795 14 3 14 75 Mattia Pasini FTR 23 +24.388 10 2 15 44 Pol Espargaró FTR 23 +34.071 20 1 16 16 Jules Cluzel Suter 23 +38.236 26 17 9 Kenny Noyes FTR 23 +39.505 29 18 76 Max Neukirchner MZ-RE Honda 23 +39.609 28 19 54 Kenan Sofuoğlu Suter 23 +42.296 18 20 45 Scott Redding Suter 23 +44.162 15 21 53 Valentin Debise FTR 23 +46.662 30 22 14 Ratthapark Wilairot FTR 23 +46.950 25 23 68 Yonny Hernández FTR 23 +49.625 27 24 4 Randy Krummenacher Kalex 23 +50.590 36 25 39 Robertino Pietri Suter 23 +52.044 35 26 6 Joan Olivé FTR 23 +52.365 33 27 63 Mike Di Meglio Tech 3 23 +1:02.873 24 28 7 Tomoyoshi Koyama TSR 6 23 +1:35.559 32 29 95 Mashel Al Naimi Moriwaki 23 +1:35.771 34 30 72 Yuki Takahashi Moriwaki 22 +1 lap 5 31 40 Aleix Espargaró Pons Kalex 20 +3 laps 13 Ret 80 Axel Pons Pons Kalex 17 Retirement 23 Ret 64 Santiago Hernández FTR 17 Accident 31 Ret 18 Jordi Torres Suter 0 Collision 11 Ret 35 Raffaele De Rosa Suter 0 Collision 19 Ret 88 Ricard Cardús Moriwaki 0 Collision 21 DNS 30 Takaaki Nakagami SuterInjured DNS 33 Sergio Gadea MoriwakiInjured OFFICIAL MOTO2 REPORT

125 cc classification Pos. No. Rider Manufacturer Laps Time/Retired Grid Points 1 5 Johann Zarco Derbi 20 39:49.968 1 25 2 18 Nicolás Terol Aprilia 20 +5.900 3 20 3 55 Héctor Faubel Aprilia 20 +13.605 2 16 4 25 Maverick Viñales Aprilia 20 +16.191 4 13 5 11 Sandro Cortese Aprilia 20 +23.422 7 11 6 94 Jonas Folger Aprilia 20 +23.661 8 10 7 23 Alberto Moncayo Aprilia 20 +24.034 5 9 8 26 Adrián Martín Aprilia 20 +24.171 9 8 9 52 Danny Kent Aprilia 20 +49.118 18 7 10 19 Alessandro Tonucci Aprilia 20 +51.393 10 6 11 84 Jakub Kornfeil Aprilia 20 +51.893 13 5 12 77 Marcel Schrötter Mahindra 20 +1:01.043 16 4 13 53 Jasper Iwema Aprilia 20 +1:04.921 15 3 14 21 Harry Stafford Aprilia 20 +1:05.606 24 2 15 63 Zulfahmi Khairuddin Derbi 20 +1:06.245 23 1 16 8 Jack Miller KTM 20 +1:07.653 26 17 82 Hikari Ookubo Honda 20 +1:07.770 25 18 50 Sturla Fagerhaug Aprilia 20 +1:11.052 30 19 30 Giulian Pedone Aprilia 20 +1:15.954 20 20 14 Brad Binder Aprilia 20 +1:16.227 27 21 65 Syunya Mori Aprilia 20 +1:16.729 32 22 36 Joan Perelló Aprilia 20 +1:17.514 29 23 39 Luis Salom Aprilia 20 +1:40.618 12 24 79 Takehiro Yamamoto Honda 20 +1:41.836 33 25 89 Luca Fabrizio Aprilia 19 +1 lap 35 Ret 17 Taylor Mackenzie Aprilia 17 Retirement 28 Ret 10 Alexis Masbou KTM 13 Retirement 21 Ret 81 Hyuga Watanabe Honda 10 Retirement 31 Ret 99 Danny Webb Mahindra 9 Retirement 19 Ret 7 Efrén Vázquez Derbi 8 Retirement 6 Ret 31 Niklas Ajo Aprilia 1 Accident 22 Ret 3 Luigi Morciano Aprilia 1 Accident 11 Ret 28 Josep Rodríguez Aprilia 1 Retirement 14 DNS 96 Louis Rossi Aprilia 0 Did not start 17 DNS 80 Jun Ohnishi Honda 0 Did not start 34 OFFICIAL 125cc REPORT

Championship standings after the race (MotoGP) Below are the standings for the top five riders and constructors after round fifteen has concluded.

Riders' Championship standings Rider Points 1 Casey Stoner 300 2 Jorge Lorenzo 260 3 Andrea Dovizioso 196 4 Dani Pedrosa 195 5 Ben Spies 156

Constructors' Championship standings Constructor Points 1 Honda 355 2 Yamaha 294 3 Ducati 162 4 Suzuki 73

Note: Only the top five positions are included for both sets of standings.

References