2008 Japanese motorcycle Grand Prix
The 2008 Japanese motorcycle Grand Prix was the fifteenth round of the 2008 MotoGP Championship. It took place on the weekend of 26–28 September 2008 at the Twin Ring Motegi, located in Motegi, Japan.
250 cc classification
125 cc classification
Championship standings after the race (MotoGP)
Below are the standings for the top five riders and constructors after round fifteen has concluded.
;Riders' Championship standings
;Constructors' Championship standings
| Constructor | Points |
| 1 |  Yamaha | 341 |
| 2 |  Ducati | 261 |
| 3 | Honda | 259 |
| 4 | Suzuki | 159 |
| 5 | Kawasaki | 77 |
- Note: Only the top five positions are included for both sets of standings.
Casey Stoner
Dani Pedrosa