| 1996 |
SL Takarazuka Tournament, Cadet: 3rd |
| 1997 |
SL All Japan Cadet: 1st |
| 1998 |
JAF Cup West Cadet: 1st |
| 1999 |
SL All Japan Tournament (S stock, D class): 1st |
| 2000 |
All Japan Junior Kart Championship |
|
Suzuka Kart Championship: 1st |
| 2001 |
All Japan Kart Championship, ICA: 1st |
|
Asia Pacific Kart Championship, ICA |
|
Esso Formula Toyota Racing School scholarship |
| 2002 |
Kart Euro Championship |
|
Esso Formula Toyota Series (1 race) |
| 2003 |
Esso Formula Toyota Series: 2nd |
| 2004 |
Formula Renault Italia: 4th (2 wins) |
| 2005 |
Formula Renault Italia: 1st (6 wins) |
|
Formula Renault Eurocup: 1st (5 wins) |
| 2006 |
Formula 3 Euro Series: 8th (Rookie of the Year) |
| 2007 |
Formula 3 Euro Series: 4th (1 win) |
| 2008 |
GP2 Series Asia: 6th (2 wins) |
|
GP2 Series: 16th (1 win) |
|
Formula 1 (TOYOTA Racing): Third driver |
| 2009 |
GP2 Asia Series: 1st (2 wins) |
|
GP2 Series: 16th (1 podium) |
|
Formula 1 (TOYOTA Racing): 18th (two races) |
| 2010 |
Formula 1 (Sauber): 12th |
| 2011 |
Formula 1 (Sauber): 12th |
| 2012 |
Formula 1 (Sauber): 12th |
| 2013 |
WEC (Ferrari): 7th (World Endurance Cup for Pro Drivers) |
| 2014 |
Formula 1 (Caterham): 22nd |
