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
Tōhoku earthquake
2011 Tōhoku earthquake and tsunami
2011 Japanese motorcycle Grand Prix