2003 Japanese Formula 3 Championship
The 2003 Japanese Formula 3 Championship was the 25th edition of the Japanese Formula 3 Championship. It began on 22 March at Suzuka and ended on 19 October at Motegi. Australian driver James Courtney took the championship title, winning 13 from 20 races.
Teams and drivers
- All teams were Japanese-registered. All cars were powered by Bridgestone tyres.
| Team | No | Driver | Chassis | Engine | Rounds | |||||||||||||||||
| Dome Racing Team | 1 |  Race calendar and results;NotesStandings
|