Sebastien Buemi of Switzerland drives his Toyota TS040 Hybrid number 1 during the Le Mans 24-hour sportscar race in Le Mans, central France June 13, 2015. The Toyota TS040 Hybrid number 1 is also driven by Anthony Davidson of Britain and Kazuki Nakajima of Japan. REUTERS/Stephane Mahe

Alexander Wurz of Austria drives his Toyota TS040 Hybrid number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Stephane Sarrazin of France drives his Toyota TS040 Hybrid number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and Alexander Wurz of Austria. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

France's Stephane Sarrazin drives his Toyota TS040 Hybrid number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and Alexander Wurz of Austria. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Stephane Sarrazin of France drives his Toyota TS040 Hybrid number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and Alexander Wurz of Austria. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria drives his Toyota TS040 Hybrid number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria drives his Toyota TS040 Hybrid number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France, June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria leads the pack with his Toyota TS040 Hybrid number 7 just after the start of the Le Mans 24-hour sportscar race in Le Mans, central France, June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria leads the pack with his Toyota TS040 Hybrid number 7 just after the start of the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria leads the pack with his Toyota TS040 Hybrid number 7 just after the start of the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria leads the pack with his Toyota TS040 Hybrid number 7 just after the start of the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria leads the pack with his Toyota TS040 Hybrid number 7 just after the start of the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 is also driven by Kazuki Nakajima of Japan and France's Stephane Sarrazin. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Kazuki Nakajima of Japan drives his Toyota TS040 Hybrid number 7 during the warm up before the start of the Le Mans 24-hour sportscar race in Le Mans, central France June 14, 2014. The Toyota TS040 Hybrid number 7 will start the race in pole position. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Kazuki Nakajima of Japan drives his Toyota TS 030 Hybrid Number 7 as a Danish flag is flown at half-mast during the Le Mans 24-hour sportscar race in Le Mans, central France June 23, 2013. Motorsport mourned Danish driver Allan Simonsen after his fatal crash at the Le Mans 24 Hours sportscar race on Saturday. The 34-year-old, driving an Aston Martin, spun into the barriers at Tertre Rouge on lap three after just 10 minutes of the endurance race. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Kazuki Nakajima of Japan drives his Toyota Ts 030 - Hybrid Number 7 during a warm-up session before the Le Mans 24-hour sportscar race in Le Mans, central France June 22, 2013. The Toyota Ts 030 - Hybrid Number 7 is also driven by Nicolas Lapierre of France and Alexander Wurz of Austria. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Nicolas Lapierre of France drives his Toyota Ts 030- Hybrid Number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030- Hybrid Number 7 is also driven by Alexander Wurz of Austria and Kazuki Nakajima of Japan. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria drives his Toyota Ts 030- Hybrid Number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030 - Hybrid Number 7 is also driven by Nicolas Lapierre of France and Kazuki Nakajima of Japan. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria drives his Toyota Ts 030- Hybrid Number 7 during the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030 - Hybrid Number 7 is also driven by Nicolas Lapierre of France and Kazuki Nakajima of Japan. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Kazuki Nakajima of Japan looks at the pit near his Toyota Ts 030 - Hybrid Number 7 during a warm-up session before the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030 - Hybrid Number 7 is also driven by Nicolas Lapierre of France and Alexander Wurz of Austria. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Kazuki Nakajima of Japan gets out of his Toyota Ts 030 - Hybrid Number 7 for a driver change during a warm-up session before the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030 - Hybrid Number 7 is also driven by Nicolas Lapierre of France and Alexander Wurz of Austria. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria drives his Toyota Ts 030- Hybrid Number 7 during a warm-up session before the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030 - Hybrid Number 7 is also driven by Nicolas Lapierre of France and Kazuki Nakajima of Japan. REUTERS/Regis Duvignau (FRANCE - Tags: SPORT MOTORSPORT)

Mechanics work on the Toyota Ts 030 - Hybrid Number 7 during a warm-up session before the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030 - Hybrid Number 7 is driven by Nicolas Lapierre of France, Alexander Wurz of Austria and Kazuki Nakajima of Japan. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Alexander Wurz of Austria changes his seat in his Toyota Ts 030 - Hybrid Number 7 during a warm-up session before the Le Mans 24-hour sportscar race in Le Mans, central France June 16, 2012. The Toyota Ts 030 - Hybrid Number 7 is also driven by Nicolas Lapierre of France and Kazuki Nakajima of Japan. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT MOTORSPORT)

Pilots Alexander Wurz of Austria (L), Nicolas Lapierre of France (C) and Kazuki Nakajima of Japan (R) stand behind the Toyota LMP1 hybrid race car during a test session at the Paul Ricard circuit in Le Castellet, January 25, 2012. The new Toyota hybrid powered sports car will compete the World Endurance Championship and the 24 hours of Le Mans endurance race in 2012. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SPORT MOTORSPORT)

Pilots Alexander Wurz of Austria (L), Nicolas Lapierre of France (C) and Kazuki Nakajima of Japan (R) stand behind the Toyota LMP1 hybrid race car during a test session at the Paul Ricard circuit in Le Castellet, January 25, 2012. The new Toyota hybrid powered sports car will compete the World Endurance Championship and the 24 hours of Le Mans endurance race in 2012. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SPORT MOTORSPORT)

Pilots Alexander Wurz of Austria (L), Nicolas Lapierre of France (C) and Kazuki Nakajima of Japan (R) stand behind the Toyota LMP1 hybrid race car during a test session at the Paul Ricard circuit in Le Castellet, January 25, 2012. The new Toyota hybrid powered sports car will compete the World Endurance Championship and the 24 hours of Le Mans endurance race in 2012. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SPORT MOTORSPORT)

Williams Formula One driver Kazuki Nakajima of Japan drives during the first practice session of the Abu Dhabi F1 Grand Prix at the Yas Marina circuit October 30, 2009. REUTERS/Caren Firouz (UNITED ARAB EMIRATES SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan (L) talks with his compatriot, Toyota's driver Kamui Kobayashi, before the start of the Brazilian F1 Grand Prix at the Interlagos racetrack in Sao Paulo October 18, 2009. REUTERS/Paulo Whitaker (BRAZIL SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan participates in the third free training session at the Interlagos racetrack in Sao Paulo October 17, 2009. The Brazilian F1 Grand Prix will be held here on Sunday. REUTERS/Sergio Moraes (BRAZIL SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan participates in the first free training session at the Interlagos racetrack in Sao Paulo October 16, 2009. The Brazilian F1 Grand Prix will be held here on Sunday. REUTERS/Sergio Moraes (BRAZIL SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan covers his ears as he watches a car pass during the first free training session at the Interlagos racetrack in Sao Paulo October 16, 2009. The Brazilian F1 Grand Prix will be held here on Sunday. REUTERS/Paulo Whitaker (BRAZIL SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan steps off the track during the first free training session at the Interlagos racetrack in Sao Paulo October 16, 2009. The Brazilian F1 Grand Prix will be held here on Sunday. REUTERS/Paulo Whitaker (BRAZIL SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan puts on his helmet before the start of the first free training session at the Interlagos racetrack in Sao Paulo October 16, 2009. The Brazilian F1 Grand Prix will be held here on Sunday. REUTERS/Bruno Domingos (BRAZIL SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan stands in the team's pit before the start of the first free training session at the Interlagos racetrack in Sao Paulo October 16, 2009. The Brazilian F1 Grand Prix will be held here on Sunday. REUTERS/Bruno Domingos (BRAZIL SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan stands in his team's pit ahead of the first practice session for the British F1 Grand Prix at Silverstone, central England, in this June 19, 2009 file photo. Japanese motor racing fans are wondering where it all went. Once, their nation was home to three Formula One teams, two grand prix tracks and several drivers but there is little left to cheer for. To match feature MOTOR RACING/JAPAN. REUTERS/Nigel Roddis/Files (BRITAIN SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan plugs his ears at a free practice session for the Japanese F1 Grand Prix in Suzuka, central Japan, in this October 2, 2009 file photo. Japanese motor racing fans are wondering where it all went. Once, their nation was home to three Formula One teams, two grand prix tracks and several drivers but there is little left to cheer for. To match feature MOTOR-RACING/JAPAN REUTERS/Kim Kyung-Hoon/Files (JAPAN SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan drives during a free practice session for the Japanese F1 Grand Prix in Suzuka, central Japan, October 2, 2009. REUTERS/Toru Hanai (JAPAN SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan plugs his ears at a free practice session for the Japanese F1 Grand Prix in Suzuka, central Japan, October 2, 2009. REUTERS/Kim Kyung-Hoon (JAPAN SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan puts on his helmet at a free practice session for the Japanese F1 Grand Prix in Suzuka, central Japan, October 2, 2009. REUTERS/Kim Kyung-Hoon (JAPAN SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan attends a news conference ahead of the Japanese F1 Grand Prix in Suzuka, central Japan, October 1, 2009. REUTERS/Kim Kyung-Hoon (JAPAN SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan arrives at Suzuka Circuit ahead of the Japanese F1 Grand Prix in Suzuka, central Japan, October 1, 2009. REUTERS/Toru Hanai (JAPAN SPORT MOTOR RACING)

McLaren Formula One driver Lewis Hamilton of Britain (L) drives past a stand after winning the Singapore F1 Grand Prix at the Marina Bay street circuit September 27, 2009. Other drivers are Red Bull Formula One driver Sebastian Vettel of Germany (2nd L), Williams Formula One driver Nico Rosberg of Germany (2nd R) and Williams Formula One driver Kazuki Nakajima of Japan (R). REUTERS/Pablo Sanchez (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan drives during the Singapore F1 Grand Prix at the Marina Bay street circuit September 27, 2009. REUTERS/Tim Chong (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan drives during the Singapore F1 Grand Prix at the Marina Bay street circuit September 27, 2009. REUTERS/Tim Chong (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan negotiates turn 16 during the third practice session the Singapore F1 Grand Prix at the Marina Bay street circuit September 26, 2009. REUTERS/Tim Chong (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan is pictured ahead of the qualifying session of the Singapore F1 Grand Prix at the Marina Bay street circuit September 26, 2009. REUTERS/Tim Chong (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan stands inside the pits during the first practice session of the Singapore F1 Grand Prix at the Marina Bay street circuit September 25, 2009. REUTERS/Joachim Herrmann (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan drives during the first practice session of the Singapore F1 Grand Prix at the Marina Bay street circuit September 25, 2009. REUTERS/Russell Boyce (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan prepares inside the pit at the first practice session of the Singapore F1 Grand Prix at the Marina Bay street circuit September 25, 2009. REUTERS/Joachim Herrmann (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan takes off his helmet at the first practice session of the Singapore F1 Grand Prix at the Marina Bay street circuit September 25, 2009. REUTERS/Joachim Herrmann (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan arrives at the pits, after signing autographs for fans, prior to the start of the first practice session of the Singapore F1 Grand Prix at the Marina Bay street circuit September 25, 2009. REUTERS/Vivek Prakash (SINGAPORE SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan (L) walks the track of the Singapore F1 Grand Prix Marina Bay street circuit September 24, 2009. REUTERS/Vivek Prakash (SINGAPORE SPORT MOTOR RACING)

Williams' Formula One driver Kazuki Nakajima of Japan sits in his car during the second free practice session ahead of the weekend's Belgian F1 Grand Prix in Spa Francorchamps August 28, 2009. REUTERS/Thierry Roge (BELGIUM SPORT MOTOR RACING)

Williams' Formula One driver Kazuki Nakajima of Japan drives his car during the first free practice session ahead of the weekend's Belgian F1 Grand Prix in Spa Francorchamps August 28, 2009. REUTERS/Thierry Roge (BELGIUM SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan sits in his car during the first free practice session ahead of the weekend's Belgian F1 Grand Prix in Spa Francorchamps August 28, 2009. REUTERS/Yves Herman (BELGIUM SPORT MOTOR RACING)

Williams' Formula One driver Kazuki Nakajima of Japan drives into the pitlane with the sidewall burst on the left rear wheel during the European F1 Grand Prix in Valencia August 23, 2009. REUTERS/Albert Gea (SPAIN SPORT MOTOR RACING)

Williams' Formula One driver Kazuki Nakajima of Japan drives with the sidewall burst on the left rear wheel during the European F1 Grand Prix in Valencia August 23, 2009. REUTERS/Albert Gea (SPAIN)

Williams Formula One driver Kazuki Nakajima of Japan drives his car during the second practice session at the European F1 Grand Prix in Valencia August 21, 2009. REUTERS/Dani Cardona (SPAIN SPORT MOTOR RACING)

Williams Formula One driver Kazuki Nakajima of Japan steers his car during the Hungarian F1 Grand Prix at the Hungaroring circuit near Budapest July 26, 2009. REUTERS/Dominic Ebenbichler (HUNGARY)

Williams Formula One driver Kazuki Nakajima of Japan drives during a practice session for the Hungarian F1 Grand Prix at the Hungaroring circuit near Budapest July 24, 2009. The Grand Prix will take place on July 26. REUTERS/ Stoyan Nenov (HUNGARY SPORT MOTOR RACING)