High Quality Content by WIKIPEDIA articles! The 2010 Indy Japan 300 was the eighth running of the Indy Japan 300 and the 16th round of the 2010 IndyCar Series season. It took place on Sunday September 19, 2010. The race was contested over 200 laps at the 1.520-mile (2.446 km) Twin Ring Motegi in Motegi, Tochigi, Japan. This was the last race to be contested by Indy Cars at the Twin Ring Motegi oval circuit as they will be switching to the road course for the last race in 2011.