# Grand Prix moto du Japon 1990

Le Grand Prix moto du Japon 1990 est la première manche du championnat du monde de vitesse moto 1990. L'épreuve s'est déroulée du 23 au 25 mars 1990 sur le circuit de Suzuka.
C'est la dixième édition du Grand Prix moto du Japon.

## Classement catégorie 500 cm$^3$

| Pos | # | Pilote | Constructeur | Tours | Temps/Écart | Grille | Points |
| 1 | 2 | Wayne Rainey | Yamaha | 22 | 48 min 52 s 475 | 1 | 20 |
| 2 | 10 | Wayne Gardner | Honda | 22 | + 3 s 237 | 3 | 17 |
| 3 | 34 | Kevin Schwantz | Suzuki | 22 | + 15 s 556 | 2 | 15 |
| 4 | 4 | Kevin Magee | Suzuki | 22 | + 40 s 689 | 7 | 13 |
| 5 | 6 | Sito Pons | Honda | 22 | + 41 s 008 | 9 | 11 |
| 6 | 21 | Tadahiko Taira | Yamaha | 22 | + 51 s 363 | 10 | 10 |
| 7 | 5 | Pierfrancesco Chili | Honda | 22 | + 51 s 536 | 6 | 9 |
| 8 | 14 | Jean-Philippe Ruggia | Yamaha | 22 | + 53 s 739 | 15 | 8 |
| 9 | 39 | Shinichi Itoh | Honda | 22 | +1 min 02 s 515 | 8 | 7 |
| 10 | 11 | Juan Garriga | Yamaha | 22 | +1 min 25 s 526 | 18 | 6 |
| 11 | 37 | Hikaru Miyagi | Honda | 22 | +1 min 29 s 184 | 20 | 5 |
| 12 | 41 | Shinji Katayama | Yamaha | 22 | +1 min 42 s 002 | 21 | 4 |
| 13 | 38 | Osamu Hiwatashi | Suzuki | 22 | +1 min 42 s 713 | 19 | 3 |
| Abd. | 43 | Keiji Ohishi | Yamaha | 18 | Abandon | 22 | |
| Abd. | 18 | Randy Mamola | Cagiva | 18 | Abandon | 17 | |
| Abd. | 28 | Alex Barros | Cagiva | 12 | Abandon | 24 | |
| Abd. | 40 | Satoshi Tsujimoto | Suzuki | 9 | Abandon | 13 | |
| Abd. | 3 | Christian Sarron | Yamaha | 8 | Abandon | 11 | |
| Abd. | 8 | Ron Haslam | Cagiva | 8 | Abandon | 23 | |
| Abd. | 36 | Kunio Machii | Yamaha | 7 | Abandon | 12 | |
| Abd. | 1 | Eddie Lawson | Yamaha | 4 | Abandon | 4 | |
| Abd. | 9 | Mick Doohan | Honda | 4 | Abandon | 5 | |
| Abd. | 15 | Norihiko Fujiwara | Yamaha | 2 | Abandon | 16 | |
| Np. | 35 | Shunji Yatsushiro | Honda | | Abandon | 14 | |
| Nq. | 26 | Niggi Schmassman | Honda | | Non qualifié | | |
| Nq. | 44 | Kenmei Matsumoto | Honda | | Non qualifié | | |

## Classement catégorie 250 cm$^3$

| Pos | # | Pilote | Constructeur | Tours | Temps/Écart | Grille | Points |
| 1 | 5 | Luca Cadalora | Yamaha | 20 | 45 min 55 s 994 | 2 | 20 |
| 2 | 4 | Carlos Cardús | Honda | 20 | + 3 s 700 | 4 | 17 |
| 3 | 14 | Wilco Zeelenberg | Honda | 20 | + 3 s 886 | 14 | 15 |
| 4 | 8 | Dominique Sarron | Honda | 20 | + 4 s 193 | 3 | 13 |
| 5 | 3 | Jacques Cornu | Honda | 20 | + 4 s 360 | 5 | 11 |
| 6 | 15 | Toshihiko Honma | Honda | 20 | + 6 s 545 | 6 | 10 |
| 7 | 44 | Tetsuya Harada | Yamaha | 20 | + 25 s 457 | 15 | 9 |
| 8 | 47 | Nobuatsu Aoki | Honda | 20 | + 30 s 677 | 9 | 8 |
| 9 | 43 | Masumitsu Taguchi | Honda | 20 | + 53 s 101 | 16 | 7 |
| 10 | 48 | Tsutomu Udagawa | Honda | 20 | + 53 s 312 | 12 | 6 |
| 11 | 16 | Jochen Schmid | Honda | 20 | + 53 s 831 | 17 | 5 |
| 12 | 50 | Jun Suzuki | Honda | 20 | + 59 s 621 | 18 | 4 |
| 13 | 7 | Niall Mackenzie | Yamaha | 20 | +1 min 11 s 536 | 24 | 3 |
| 14 | 19 | John Kocinski | Yamaha | 20 | +1 min 14 s 359 | 1 | 2 |
| 15 | 56 | Yukio Nukumi | Yamaha | 20 | +1 min 15 s 024 | 27 | 1 |
| 16 | 32 | Harald Eckl | Aprilia | 20 | +1 min 16 s 516 | 33 | |
| 17 | 53 | Yoshiyuki Sugai | Honda | 20 | +1 min 16 s 684 | 25 | |
| 18 | 12 | Alan Carter | Honda | 20 | +1 min 16 s 722 | 37 | |
| 19 | 11 | Loris Reggiani | Aprilia | 20 | +1 min 16 s 738 | 32 | |
| 20 | 57 | Toshinobu Shiomori | Yamaha | 20 | +1 min 16 s 793 | 36 | |
| 21 | 52 | Akio Mitoma | Honda | 20 | +1 min 26 s 156 | 20 | |
| 22 | 39 | Kevin Mitchell | Yamaha | 20 | +1 min 32 s 242 | 28 | |
| 23 | 22 | Erich Neumair | Yamaha | 20 | +1 min 43 s 845 | 31 | |
| 24 | 30 | José Barresi | Yamaha | 19 | +1 tour | 38 | |
| Abd. | 17 | Carlos Lavado | Aprilia | 19 | Abandon | 13 | |
| Abd. | 54 | Yoshiari Hori | Aprilia | 16 | Abandon | 26 | |
| Abd. | 2 | Reinhold Roth | Honda | 13 | Abandon | 10 | |
| Abd. | 20 | Andrea Borgonovo | Aprilia | 12 | Abandon | 21 | |
| Abd. | 6 | Masahiro Shimizu | Honda | 8 | Abandon | 8 | |
| Abd. | 55 | Jorge Martínez | JJ Cobas | 7 | Abandon | 29 | |
| Abd. | 45 | Kyoji Nanba | Yamaha | 7 | Abandon | 34 | |
| Abd. | 26 | Tadayuki Okada | Honda | 6 | Abandon | 7 | |
| Abd. | 33 | Andreas Preining | Aprilia | 6 | Abandon | 30 | |
| Abd. | 35 | Rachel Nicotte | Yamaha | 6 | Abandon | 35 | |
| Abd. | 51 | K. Ohta | Honda | 3 | Abandon | 22 | |
| Abd. | 46 | Toshiyuki Arakaki | Honda | 2 | Abandon | 13 | |
| Abd. | 27 | Didier de Radiguès | Honda | 1 | Abandon | 23 | |
| Abd. | 9 | Helmut Bradl | Honda | 0 | Abandon | 11 | |
| Np. | | Darren Milner | Aprilia | | Non partant | | |

## Classement catégorie 125 cm$^3$

| Pos | # | Pilote | Constructeur | Tours | Temps/Écart | Grille | Points |
| 1 | 2 | Hans Spaan | Honda | 16 | 39 min 08 s 572 | 8 | 20 |
| 2 | 7 | Stefan Prein | Honda | 16 | + 4 s 312 | 6 | 17 |
| 3 | 6 | Koji Takada | Honda | 16 | + 5 s 126 | 3 | 15 |
| 4 | 16 | Dirk Raudies | Honda | 16 | + 14 s 771 | 4 | 13 |
| 5 | 68 | Kinya Wada | Honda | 16 | + 20 s 734 | 1 | 11 |
| 6 | 65 | Loris Capirossi | Honda | 16 | + 23 s 289 | 26 | 10 |
| 7 | 5 | Fausto Gresini | Honda | 16 | + 23 s 361 | 21 | 9 |
| 8 | 66 | Yoshifumi Ichimiya | Honda | 16 | + 24 s 121 | 5 | 8 |
| 9 | 11 | Adi Stadler | JJ Cobas | 16 | + 24 s 997 | 18 | 7 |
| 10 | 67 | Yukiho Hinokio | Honda | 16 | + 27 s 464 | 11 | 6 |
| 11 | 41 | Fuyuki Yamazaki | Honda | 16 | + 40 s 719 | 19 | 5 |
| 12 | 4 | Hisashi Unemoto | Honda | 16 | + 41 s 890 | 7 | 4 |
| 13 | 69 | Nobuyuki Wakai | Honda | 16 | + 44 s 844 | 17 | 3 |
| 14 | 62 | Soichiro Sato | Honda | 16 | + 53 s 292 | 13 | 2 |
| 15 | 50 | Steve Patrickson | Honda | 16 | + 58 s 210 | 29 | 1 |
| 16 | 58 | Yosuke Yamakawa | Honda | 16 | +1 min 03 s 757 | 12 | |
| 17 | 64 | Shinichi Fujiyama | Honda | 16 | +1 min 04 s 102 | 14 | |
| 18 | 57 | Manuel Hernández | Honda | 16 | +1 min 30 s 123 | 23 | |
| 19 | 46 | Johnny Wickström | Honda | 16 | +1 min 33 s 011 | 28 | |
| 20 | 52 | Maurizio Vitali | Gazzaniga | 16 | +1 min 34 s 748 | 38 | |
| 21 | 61 | Yukata Fujiwara | Honda | 16 | +1 min 34 s 866 | 24 | |
| 22 | 56 | Bady Hassaine | Honda | 16 | +1 min 34 s 940 | 36 | |
| 23 | 21 | Stefan Dörflinger | Aprilia | 16 | +1 min 38 s 071 | 30 | |
| 24 | 60 | Masayuki Hirose | Honda | 16 | +1 min 38 s 422 | 22 | |
| 25 | 40 | Peter Galvin | Honda | 16 | +2 min 23 s 240 | 35 | |
| 26 | 18 | Taru Rinne | Honda | 15 | +1 tour | 40 | |
| Abd. | 59 | Masato Shima | Honda | 15 | Abandon | 16 | |
| Abd. | 8 | Julián Miralles | JJ Cobas | 15 | Abandon | 15 | |
| Abd. | 63 | Toshiyuki Okamoto | Honda | 12 | Abandon | 9 | |
| Abd. | 55 | Jorge Martínez | JJ Cobas | 11 | Abandon | 2 | |
| Abd. | 12 | Robin Milton | Honda | 8 | Abandon | 32 | |
| Abd. | 45 | Thierry Feuz | Honda | 5 | Abandon | 10 | |
| Abd. | 3 | Ezio Gianola | Derbi | 3 | Abandon | 27 | |
| Abd. | 43 | Robin Appleyard | Honda | 2 | Abandon | 33 | |
| Abd. | 22 | Manuel Herreros | JJ Cobas | 1 | Abandon | 34 | |
| Abd. | 10 | Allan Scott | Honda | 1 | Abandon | 20 | |
| Abd. | 51 | Stuart Edwards | Honda | 1 | Abandon | 37 | |
| Np. | 54 | Heinz Lüthi | Honda | | Non partant | 25 | |
| Np. | 25 | Herri Torrontegui | Honda | | Non partant | 31 | |
| Np. | 38 | Luis Álvaro | Derbi | | Non partant | 39 | |
| Nq. | 48 | Heinz Paschen | Aprilia | | Non qualifié | | |
| Nq. | 26 | Gabriele Gnani | Gnani | | Non qualifié | | |
| Nq. | 53 | Stefan Brägger | Aprilia | | Non qualifié | | |