The 2011 Japanese Grand Prix (formally the XXXVII Japanese Grand Prix) was a Formula One motor race that was held on 9 October 2011 at the Suzuka Circuit in Suzuka, Japan. It was the fifteenth round of the 2011 Formula One season, and the thirty-eighth time the Japanese Grand Prix had been held. The race, contested over 53 laps, was won by McLaren's Jenson Button, after he started from second on the grid. Fernando Alonso finished in second place for Scuderia Ferrari, and Sebastian Vettel completed the podium, with third, for Red Bull Racing.

Vettel had started the race in pole position alongside Button, whom he had marginally outqualified. The two drivers were the only two within mathematical contention for the title. Button attempted to overtake Vettel at the start of the race, yet was pressured towards the grass by Vettel which resulted in him losing second place to Lewis Hamilton (who had started in third). Vettel was passed by Button in the second pit-stop phase, and was then passed by Alonso in the third. Hamilton slipped back from second to fifth, predominantly in the pit-stops; debris from a collision between himself and Felipe Massa caused a safety car period in the race. The second Red Bull of Mark Webber finished in fourth position.

As a consequence of the race, Vettel secured the World Drivers' Championship for the second year in succession, having only required one point prior to the weekend to be declared World Champion. Button remained in second place on the standings after his victory, extending the gap over third-placed Alonso to eight points. In the World Constructors' Championship, Red Bull's championship lead over McLaren was cut to 130 points, with Ferrari a further 96 points behind in third position.

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