Aida

The Okayama International Circuit is in Mimasaka, Okayama Prefecture, Japan. The track is 3.703 kilometres long, has 13 corners and is run clockwise. It opened in 1990 as a private racing venue. Before 2005 it was known as TI Circuit Aida, and it has carried its present name since 2005.

The circuit arrived in the Formula One World Championship in 1994, when it staged the Pacific Grand Prix. The race returned to the calendar a year later. Michael Schumacher won both times, driving for Benetton. His victory in 1995 settled the drivers' championship there, while the constructors' title was still open on that day. This meant Japan hosted more than one Formula One race in the same year.

After 1995 there were no more world championship races at Aida, so the circuit's Formula One history consists of two events. The remote location of the track within the country is given as the main reason the race was dropped. A round of the International Touring Car Championship planned for 1996 to take the place of the Formula One date was also moved, to Suzuka.

The circuit stayed busy with other series. Super Formula raced there in 2007 and 2008 and again from 2015 to 2020, and the World Touring Car Championship visited from 2008 to 2010. The 2008 WTCC round was the first FIA world championship race at the circuit since 1995.