O Indy Japan 300 de 2010 foi a décima sexta corrida da temporada de 2010 da IndyCar Series. A corrida foi disputada no dia 19 de setembro no Twin Ring Motegi, localizado na cidade de Motegi, Japão. O vencedor foi o brasileiro Hélio Castroneves, da equipe Team Penske.
Pilotos e Equipes No total 25 carros foram inscritos para corrida. Nº Piloto Equipe Chassis Motor Pneu 2 Raphael Matos de Ferran Dragon Racing Dallara Honda 3 Hélio Castroneves Team Penske Dallara Honda 4 Dan Wheldon Panther Racing Dallara Honda 5 Takuma Sato (R) KV Racing Technology Dallara Honda 6 Ryan Briscoe Team Penske Dallara Honda 7 Danica Patrick Andretti Autosport Dallara Honda 8 E. J. Viso KV Racing Technology Dallara Honda 9 Scott Dixon Chip Ganassi Racing Dallara Honda 10 Dario Franchitti Chip Ganassi Racing Dallara Honda 11 Tony Kanaan Andretti Autosport Dallara Honda 12 Will Power Team Penske Dallara Honda 14 Vitor Meira A. J. Foyt Enterprises Dallara Honda 18 Milka Duno Dale Coyne Racing Dallara Honda 19 Alex Lloyd (R) Dale Coyne Racing Dallara Honda 22 Justin Wilson Dreyer & Reinbold Racing Dallara Honda 24 Paul Tracy Dreyer & Reinbold Racing Dallara Honda 26 Marco Andretti Andretti Autosport Dallara Honda 32 Mario Moraes KV Racing Technology Dallara Honda 34 Bertrand Baguette (R) Conquest Racing Dallara Honda 36 Roger Yasukawa Conquest Racing Dallara Honda 37 Ryan Hunter-Reay Andretti Autosport Dallara Honda 77 Alex Tagliani FAZZT Race Team Dallara Honda 78 Simona de Silvestro (R) HVM Racing Dallara Honda 02 Graham Rahal Newman/Haas/Lanigan Racing Dallara Honda 06 Hideki Mutoh Newman/Haas/Lanigan Racing Dallara Honda (R) - Rookie
Treino classificatório Pos. Nº Piloto Equipe Volta 1 Volta 2 1 3 Hélio Castroneves Team Penske 27.0967 27.0836 54.1803 2 6 Ryan Briscoe Team Penske 27.2124 27.0749 54.2873 3 12 Will Power Team Penske 27.2070 27.1156 54.3226 4 10 Dario Franchitti Chip Ganassi Racing 27.2927 27.1647 54.4574 5 26 Marco Andretti Andretti Autosport 27.3856 27.2833 54.6689 6 11 Tony Kanaan Conquest Racing 27.4408 27.2761 54.7169 7 37 Ryan Hunter-Reay Andretti Autosport 27.4661 27.3572 54.8233 8 8 E. J. Viso KV Racing Technology 27.4861 27.3745 54.8606 9 4 Dan Wheldon Panther Racing 27.5240 27.4089 54.9329 10 5 Takuma Sato (R) KV Racing Technology 27.5113 27.4310 54.9423 11 9 Scott Dixon Chip Ganassi Racing 27.5421 27.4473 54.9894 12 7 Danica Patrick Andretti Autosport 27.5479 27.4651 55.0130 13 34 Bertrand Baguette (R) Conquest Racing 27.5855 27.4665 55.0520 14 14 Vitor Meira A. J. Foyt Enterprises 27.7264 27.5603 55.2867 15 19 Alex Lloyd (R) Dale Coyne Racing 27.7669 27.6300 55.3969 16 02 Graham Rahal Newman/Haas Racing 27.6645 27.7758 55.4403 17 06 Hideki Mutoh Newman/Haas Racing 27.7581 27.6936 55.4517 18 22 Justin Wilson Dreyer & Reinbold Racing 27.8717 27.7239 55.5956 19 2 Raphael Matos de Ferran Dragon Racing 27.8230 27.7831 55.6061 20 32 Mario Moraes KV Racing Technology 27.9632 27.7428 55.7060 21 36 Roger Yasukawa Conquest Racing 28.0284 27.7240 55.7524 22 24 Paul Tracy Dreyer & Reinbold Racing 27.9825 27.9373 55.9198 23 77 Alex Tagliani FAZZT Race Team 28.0054 27.9790 55.9844 24 78 Simona de Silvestro (R) HVM Racing 28.2856 28.2527 56.5403 25 18 Milka Duno Dale Coyne Racing 28.5368 28.3071 56.8439 Relatório (R) - Rookie
Corrida Pos Nº Piloto Equipe Voltas Tempo Largada Voltas na Liderança Pontos 1 3 Hélio Castroneves Team Penske 200 2:04:04.4780 1 153 50+3 2 10 Dario Franchitti Chip Ganassi Racing 200 +4.5746 4 0 40 3 12 Will Power Team Penske 200 +5.0743 3 0 35 4 6 Ryan Briscoe Team Penske 200 +6.4825 2 32 32 5 7 Danica Patrick Andretti Autosport 200 +7.6057 12 0 30 6 9 Scott Dixon Chip Ganassi Racing 200 +8.3641 11 0 28 7 11 Tony Kanaan Andretti Autosport 200 +9.4093 6 0 26 8 02 Graham Rahal Newman/Haas Racing 200 +11.7163 16 0 24 9 37 Ryan Hunter-Reay Andretti Autosport 200 +12.2125 7 0 22 10 4 Dan Wheldon Panther Racing 200 +12.4720 9 0 20 11 26 Marco Andretti Andretti Autosport 200 +15.5007 5 0 19 12 5 Takuma Sato (R) KV Racing Technology 200 +16.0693 10 0 18 13 77 Alex Tagliani FAZZT Race Team 200 +17.6774 23 0 17 14 06 Hideki Mutoh Newman/Haas Racing 200 +18.2811 17 0 16 15 8 E. J. Viso KV Racing Technology 200 +18.7349 8 0 15 16 22 Justin Wilson Dreyer & Reinbold Racing 200 +19.4293 18 0 14 17 14 Vitor Meira A. J. Foyt Enterprises 200 +20.1047 14 0 13 18 2 Raphael Matos de Ferran Dragon Racing 200 +21.2346 19 15 12 19 18 Milka Duno Dale Coyne Racing 197 +3 voltas 25 0 12 20 36 Roger Yasukawa Conquest Racing 195 +5 voltas 21 0 12 21 19 Alex Lloyd (R) Dale Coyne Racing 131 Contato 15 0 12 22 24 Paul Tracy Dreyer & Reinbold Racing 114 Contato 22 0 12 23 78 Simona de Silvestro (R) HVM Racing 85 Mecânico 24 0 12 24 32 Mario Moraes KV Racing Technology 66 Contato 20 0 12 25 34 Bertrand Baguette (R) Conquest Racing 1 Contato 13 0 10 Relatório (R) - Rookie
Tabela do campeonato após a corrida Observe que somente as dez primeiras posições estão incluídas na tabela.
Pos Var Piloto Pontos 1 Will Power 587 2 Dario Franchitti 575 3 Hélio Castroneves 501 4 Scott Dixon 497 5 Ryan Briscoe 450
Pos Var Piloto Pontos 6 Ryan Hunter-Reay 426 7 Tony Kanaan 418 8 Marco Andretti 366 9 Dan Wheldon 366 10 Justin Wilson 349
Motegi