Roger Yasukawa IndyCar Series results at Motegi
| Year | Race # | Start | Finish | Car # | Sponsor | Chassis | Engine | Tire | Owner | Qualifying Speed | Laps | X Led | Laps Led | Status | Money | Points |
| 2003 | 3 | 15 | 21 | 55 | Panasonic ARTA | Dallara | Honda | Firestone | Fernandez | | 45 | 0 | 0 | accident | 45100 | 9 |
| 2004 | 3 | 13 | 11 | 16 | Sammy | G-Force | Honda | Firestone | Rahal | 203.863 | 198 | 0 | 0 | running | 61100 | 19 |
| 2005 | 4 | 21 | 18 | 24 | Dreyer & Reinbold Racing | Dallara | Honda | Firestone | Dreyer and Reinbold | 197.674 | 112 | 0 | 0 | engine | 50000 | 12 |
| 2008 | 3 | 18 | 14 | 77 | Interush/Wellman Racing | Dallara | Honda | Firestone | CURB/Agajanian/Beck | | 134 | 0 | 0 | running | 0 | 16 |
| 2009 | 16 | 17 | 20 | 43 | Dreyer & Reinbold Racing | Dallara | Honda | Firestone | Dreyer and Reinbold | 197.498 | 172 | 0 | 0 | contact | 0 | 12 |
| 2010 | 16 | 21 | 20 | 36 | CWE Conquest Racing | Dallara | Honda | Firestone | Conquest | 196.296 | 195 | 0 | 0 | running | 0 | 12 |
