2011 Japanese motorcycle Grand Prix

  2011 Japanese Grand Prix
Race details
Race 15 of 18 races in the
2011 Grand Prix motorcycle racing season
Date2 October 2011
Official nameGrand Prix of Japan
LocationTwin Ring Motegi
Course
  • Permanent racing facility
  • 4.801 km (2.983 mi)
MotoGP
Pole position
Rider Casey Stoner
Time 1:45.267
Fastest lap
Rider Dani Pedrosa
Time 1:46.090
Podium
First Dani Pedrosa
Second Jorge Lorenzo
Third Casey Stoner
Moto2
Pole position
Rider Marc Márquez
Time 1:52.067
Fastest lap
Rider Andrea Iannone
Time 1:52.307
Podium
First Andrea Iannone
Second Marc Márquez
Third Thomas Lüthi
125cc
Pole position
Rider Johann Zarco
Time 1:57.888
Fastest lap
Rider Johann Zarco
Time 1:58.508
Podium
First Johann Zarco
Second Nicolás Terol
Third Héctor Faubel

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.