Reigning MotoGP champion Casey Stoner is returning to action after missing three rounds due to ankle injuries.

Stoner's RCV stopped on track after just a few turns of his first run, forcing a switch to his spare bike.

Yamaha test rider Katsuyuki Nakasuga has been granted a wild-card entry for his home round, while Roberto Rolfo is replacing Mattia Pasini at Speed Master for the rest of the year.

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1. Jorge Lorenzo ESP Yamaha Factory Racing (YZR-M1) 1m 46.558s
2. Dani Pedrosa ESP Repsol Honda (RC213V) 1m 46.699s
3. Andrea Dovizioso ITA Monster Yamaha Tech 3 (YZR-M1) 1m 46.919s
4. Casey Stoner AUS Repsol Honda (RC213V) 1m 47.316s
5. Ben Spies USA Yamaha Factory Racing (YZR-M1) 1m 47.328s
6. Cal Crutchlow GBR Monster Yamaha Tech 3 (YZR-M1) 1m 47.366s
7. Nicky Hayden USA Ducati Team (GP12) 1m 47.551s
8. Stefan Bradl GER LCR Honda MotoGP (RC213V) 1m 47.561s
9. Alvaro Bautista ESP San Carlo Honda Gresini (RC213V) 1m 47.637s
10. Valentino Rossi ITA Ducati Team (GP12) 1m 47.786s
11. Katsuyuki Nakasuga JPN Yamaha YSP Racing Team (YZR-M1) 1m 48.390s
12. Hector Barbera ESP Pramac Racing (GP12) 1m 49.106s
13. Karel Abraham CZE Cardion AB Motoracing (GP12) 1m 49.160s
14. Aleix Espargaro ESP Power Electronics Aspar (ART CRT) 1m 49.265s
15. Randy De Puniet FRA Power Electronics Aspar (ART CRT) 1m 49.354s
16. Colin Edwards USA NGM Forward Racing (Suter-BMW CRT) 1m 50.184s
17. Michele Pirro ITA San Carlo Honda Gresini (FTR-Honda CRT) 1m 50.268s
18. Yonny Hernandez COL Avintia Blusens (FTR-Kawasaki CRT) 1m 50.771s
19. James Ellison GBR Paul Bird Motorsport (ART CRT) 1m 51.039s
20. Roberto Rolfo ITA Speed Master (ART CRT) 1m 51.225s
21. Ivan Silva ESP Avintia Blusens (FTR-Kawasaki CRT) 1m 52.044s
22. Danilo Petrucci ITA Came IodaRacing (Suter-BMW CRT) 1m 52.188s

Official Motegi MotoGP records: Best lap: Casey Stoner AUS Honda 1m 45.267s (2011) Fastest race lap: Dani Pedrosa ESP Honda 1m 46.090s (2011)