The 2005 Indy Japan 300 was Round 4 of the 2005 IndyCar Series. The event was held at Twin Ring Motegi, Japan on 30 April 2005. Sam Hornish Jr. started on pole position and Dan Wheldon was the race winner.
INDY JAPAN 300 Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Started | Laps | Total Time | Laps Led | Status | Points | Avg. Speed | Pit Stops |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 26 | Dan Wheldon | Dallara | Honda | Firestone | 5 | 200 | - | 31 | Running | 50 | 133.365 | - |
| 2 | 8 | Scott Sharp | Panoz | Honda | Firestone | 3 | 200 | - | 0 | Running | 40 | - | - |
| 3 | 15 | Buddy Rice | Panoz | Honda | Firestone | 11 | 200 | - | 0 | Running | 35 | - | - |
| 4 | 16 | Danica Patrick | Panoz | Honda | Firestone | 2 | 200 | - | 32 | Running | 32 | - | - |
| 5 | 7 | Bryan Herta | Dallara | Honda | Firestone | 15 | 200 | - | 5 | Running | 30 | - | - |
| 6 | 11 | Tony Kanaan | Dallara | Honda | Firestone | 10 | 199 | - | 4 | Running | 28 | - | - |
| 7 | 6 | Sam Hornish Jr. | Dallara | Toyota | Firestone | 1 | 199 | - | 14 | Running | 26 | - | - |
| 8 | 10 | Darren Manning | Panoz | Toyota | Firestone | 12 | 199 | - | 0 | Running | 24 | - | - |
| 9 | 55 | Kosuke Matsuura | Panoz | Honda | Firestone | 9 | 199 | - | 0 | Running | 22 | - | - |
| 10 | 4 | Tomas Scheckter | Dallara | Chevrolet | Firestone | 6 | 198 | - | 47 | Running | 20 | - | - |
| 11 | 3 | Helio Castroneves | Dallara | Toyota | Firestone | 4 | 198 | - | 0 | Accident | 19 | - | - |
| 12 | 33 | Ryan Briscoe | Panoz | Toyota | Firestone | 13 | 197 | - | 0 | Running | 18 | - | - |
| 13 | 83 | Patrick Carpentier | Dallara | Toyota | Firestone | 14 | 196 | - | 0 | Running | 17 | - | - |
| 14 | 14 | A.J. Foyt IV | Dallara | Toyota | Firestone | 19 | 196 | - | 0 | Running | 16 | - | - |
| 15 | 17 | Vitor Meira | Panoz | Honda | Firestone | 7 | 166 | - | 0 | Running | 15 | - | - |
| 16 | 20 | Ed Carpenter | Dallara | Toyota | Firestone | 20 | 136 | - | 0 | Accident | 14 | - | - |
| 17 | 27 | Dario Franchitti | Dallara | Honda | Firestone | 8 | 123 | - | 67 | Accident | 16 | - | - |
| 18 | 24 | Roger Yasukawa | Dallara | Honda | Firestone | 21 | 112 | - | 0 | Engine | 12 | - | - |
| 19 | 51 | Alex Barron | Dallara | Toyota | Firestone | 16 | 57 | - | 0 | Mechanical | 12 | - | - |
| 20 | 91 | Paul Dana | Dallara | Toyota | Firestone | 22 | 56 | - | 0 | Handling | 12 | - | - |
| 21 | 9 | Scott Dixon | Dallara | Toyota | Firestone | 17 | 0 | - | 0 | Accident | 12 | - | - |
| 22 | 44 | Jeff Bucknum | Dallara | Honda | Firestone | 18 | 0 | - | 0 | Accident | 12 | - | - |
| 23 | 2 | Tomas Enge | Dallara | Chevrolet | Firestone | 23 | 0 | - | 0 | DNS | 12 | - | - |