500cc Classification
| Pos | No. | Rider | Manufacturer | Laps | Time/Retired | Grid | Points |
|---|---|---|---|---|---|---|---|
| 1 | 2 | Wayne Rainey | Yamaha | 22 | 48:52.475 | 1 | 20 |
| 2 | 10 | Wayne Gardner | Honda | 22 | +3.237 | 3 | 17 |
| 3 | 34 | Kevin Schwantz | Suzuki | 22 | +15.556 | 2 | 15 |
| 4 | 4 | Kevin Magee | Suzuki | 22 | +40.689 | 7 | 13 |
| 5 | 6 | Sito Pons | Honda | 22 | +41.008 | 9 | 11 |
| 6 | 21 | Tadahiko Taira | Yamaha | 22 | +51.363 | 10 | 10 |
| 7 | 5 | Pierfrancesco Chili | Honda | 22 | +51.536 | 6 | 9 |
| 8 | 14 | Jean-Philippe Ruggia | Yamaha | 22 | +53.739 | 15 | 8 |
| 9 | 39 | Shinichi Itoh | Honda | 22 | +1:02.515 | 8 | 7 |
| 10 | 11 | Juan Garriga | Yamaha | 22 | +1:25.526 | 18 | 6 |
| 11 | 37 | Hikaru Miyagi | Honda | 22 | +1:29.184 | 20 | 5 |
| 12 | 41 | Shinji Katayama | Yamaha | 22 | +1:42.002 | 21 | 4 |
| 13 | 38 | Osamu Hiwatashi | Suzuki | 22 | +1:42.713 | 19 | 3 |
| Ret | 43 | Keiji Ohishi | Yamaha | 18 | Retirement | 22 | |
| Ret | 18 | Randy Mamola | Cagiva | 18 | Retirement | 17 | |
| Ret | 28 | Alex Barros | Cagiva | 12 | Retirement | 24 | |
| Ret | 40 | Satoshi Tsujimoto | Suzuki | 9 | Retirement | 13 | |
| Ret | 3 | Christian Sarron | Yamaha | 8 | Retirement | 11 | |
| Ret | 8 | Ron Haslam | Cagiva | 8 | Retirement | 23 | |
| Ret | 36 | Kunio Machii | Yamaha | 7 | Retirement | 12 | |
| Ret | 1 | Eddie Lawson | Yamaha | 4 | Retirement | 4 | |
| Ret | 9 | Mick Doohan | Honda | 4 | Retirement | 5 | |
| Ret | 15 | Norihiko Fujiwara | Yamaha | 2 | Retirement | 16 | |
| DNS | 35 | Shunji Yatsushiro | Honda | 14 | |||
| DNQ | 26 | Niggi Schmassman | Honda | ||||
| DNQ | 44 | Kenmei Matsumoto | Honda |
Read more about this topic: 1990 Japanese Motorcycle Grand Prix