The 2003 Japanese Grand Prix was a Formula One motor race that took place on 12 October 2003 at the Suzuka Circuit in Suzuka, Mie. It was the sixteenth and final round of the 2003 Formula One World Championship. Rubens Barrichello took pole position for the race in the Ferrari and went on to take the race win, ahead of the McLarens of Kimi Räikkönen and David Coulthard.

Michael Schumacher finished in eighth place, enough to secure his record-breaking sixth World Drivers' Championship, surpassing the record set by Juan Manuel Fangio in 1957. This was also Schumacher's fourth consecutive title, matching the record set by Fangio in 1957. Barrichello's win saw Ferrari clinch their thirteenth Constructors' Championship, the team's fifth title in a row.

This event also notably marked the last race for cars using launch control and fully-automatic gearboxes, since their reintroduction at the 2001 Spanish Grand Prix. The FIA banned these two electronic driver aid systems ahead of the 2004 season.