| 2003 MotoGP World Championship Round 1 SKYY VODKA Grand Prix of Japan DATE:2003-04-04 WEATHER : Cloudy COURSE : Dry International Racing Course |
| Free1｜Qualifiyng1｜Free2｜Qualifiyng2｜Combined｜WarmUp｜GRID｜RACE |
| GP125 Free Practice 1 |
| Pos | No | Rider | Nat. | Type | Team | Time | Delay | Gap | Lap |
| 1 | 3 | DANIEL PEDROSA | SPA | Honda | TelefonicaMovistarJuniorTeam | 2'16.531 | 12/12 | ||
| 2 | 27 | CASEY STONER | AUS | Aprilia | SafiloOxydo-LCR | 2'16.803 | 0.272 | 0.272 | 14/14 |
| 3 | 15 | ALEX DE ANGELIS | RSM | Aprilia | RacingWorld | 2'16.982 | 0.451 | 0.179 | 14/14 |
| 4 | 6 | MIRKO GIANSANTI | ITA | Aprilia | MatteoniRacing | 2'16.984 | 0.453 | 0.002 | 13/13 |
| 5 | 4 | LUCIO CECCHINELLO | ITA | Aprilia | SafiloOxydo-LCR | 2'17.230 | 0.699 | 0.246 | September 14 |
| 6 | 34 | ANDREA DOVIZIOSO | ITA | Honda | TeamScot | 2'17.666 | 1.135 | 0.436 | October 10 |
| 7 | 41 | YOUICHI UI | JPN | Aprilia | SterilgardaRacing | 2'17.911 | 1.380 | 0.245 | 13/13 |
| 8 | 7 | STEFANO PERUGINI | ITA | Aprilia | Abruzzo | 2'18.078 | 1.547 | 0.167 | 13/15 |
| 9 | 11 | MAX SABBATANI | ITA | Aprilia | Abruzzo | 2'18.249 | 1.718 | 0.171 | 14/14 |
| 10 | 42 | GIOELE PELLINO | ITA | Aprilia | SterilgardaRacing | 2'18.320 | 1.789 | 0.071 | 18/18 |
| 11 | 80 | HECTOR BARBERA | SPA | Aprilia | Master-Mxonda-AsparTeam | 2'18.420 | 1.889 | 0.100 | 7/8 |
| 12 | 58 | MARCO SIMONCELLI | ITA | Aprilia | MatteoniRacing | 2'18.423 | 1.892 | 0.003 | 16/16 |
| 13 | 79 | GABOR TALMACSI | HUN | Aprilia | Exalt-Race | 2'18.474 | 1.943 | 0.051 | 12/12 |
| 14 | 66 | SHUHEI AOYAMA | JPN | Honda | TeamHARC-PRO | 2'18.580 | 2.049 | 0.106 | 16/16 |
| 15 | 22 | PABLO NIETO | SPA | Aprilia | Master-Mxonda-AsparTeam | 2'18.755 | 2.224 | 0.175 | 8/8 |
| 16 | 33 | STEFANO BIANCO | ITA | Gilera | GileraRacing | 2'19.398 | 2.867 | 0.643 | 15/15 |
| 17 | 48 | JORGE LORENZO | SPA | Derbi | CajaMadridDerbiRacing | 2'19.500 | 2.969 | 0.102 | 13/13 |
| 18 | 8 | MASAO AZUMA | JPN | Honda | AjoMotorsport | 2'19.625 | 3.094 | 0.125 | 11/12 |
| 19 | 32 | FABRIZIO LAI | ITA | Maraguti | SemprucciAngaiaMalaguti | 2'19.797 | 3.266 | 0.172 | 9/11 |
| 20 | 24 | SIMONE CORSI | ITA | Honda | TeamScot | 2'19.959 | 3.428 | 0.162 | 14/14 |
| 21 | 12 | THOMAS LUTHI | SUI | Honda | ElitGrandPrix | 2'19.964 | 3.433 | 0.005 | 16/16 |
| 22 | 17 | STEVE JENKNER | GER | Aprilia | Exalt-Race | 2'20.314 | 3.783 | 0.350 | 8/11 |
| 23 | 1 | ARNAUD VINCENT | FRA | KTM | KTM-RedBull | 2'20.395 | 3.864 | 0.081 | 11/12 |
| 24 | 65 | TOSHIHISA KUZUHARA | JPN | Honda | HondaKumamotoRacing | 2'20.435 | 3.904 | 0.040 | 10/12 |
| 25 | 19 | ALVARO BAUTISTA | SPA | Aprilia | SeedorfRacing | 2'20.681 | 4.150 | 0.246 | 17/17 |
| 26 | 10 | ROBERTO LOCATELLI | ITA | KTM | KTM-RedBull | 2'21.206 | 4.675 | 0.525 | September 10 |
| 27 | 68 | SADAHITO SUMA | JPN | Honda | TeamLife | 2'21.253 | 4.722 | 0.047 | April 7 |
| 28 | 23 | GINO BORSOI | ITA | Aprilia | RacingWorld | 2'21.293 | 4.762 | 0.040 | 6/8 |
| 29 | 14 | CHRIS MARTIN | GBR | Aprilia | SeedorfRacing | 2'21.499 | 4.968 | 0.206 | 18/19 |
| 30 | 36 | MIKA KALLIO | FIN | Honda | AjoMotorsport | 2'21.547 | 5.016 | 0.048 | October 10 |
| 31 | 31 | JULIAN SIMON | SPA | Maraguti | SemprucciAngaiaMalaguti | 2'21.971 | 5.440 | 0.424 | 15/15 |
| 32 | 26 | EMILIO ALZAMORA | SPA | Derbi | CajaMadridDerbiRacing | 2'21.986 | 5.455 | 0.015 | 8/8 |
| 33 | 25 | IMRE TOTH | HUN | Honda | TeamHungary | 2'22.088 | 5.557 | 0.102 | 15/15 |
| 34 | 67 | AKIO TANAKA | JPN | Honda | TeamLifeHatada | 2'22.191 | 5.660 | 0.103 | 4/5 |
| 35 | 63 | MIKE DI MEGLIO | FRA | Aprilia | FreesoulRacingTeam | 2'23.236 | 6.705 | 1.045 | September 14 |
| 36 | 21 | LEON CAMIER | GBR | Honda | MetasystemRacingService | 2'23.440 | 6.909 | 0.204 | September 14 |
| 37 | 78 | PETER LENART | HUN | Honda | MetasystemRacingService | 2'26.182 | 9.651 | 2.742 | 14/14 |
| 38 | 64 | CHEUNG WAI ON | CHI | Honda | CheungWingTeam | 2'27.149 | 10.618 | 0.967 | 11/13 |
