Okayama International Circuit

Okayama International Circuit is a motorsport facility located in Mimasaka, Okayama Prefecture, Japan, in the Chugoku region. The circuit opened in 1990 as TI Circuit Aida and was renamed in 2005 as Okayama International Circuit. The track measures 3.703 kilometers (2.301 miles) in length with a track width ranging from 12 to 15 meters and features an elevation change of 29 meters.

The circuit has become a cornerstone venue for Japanese domestic racing, particularly for the Super GT series. The first Super GT non-championship race was held at the circuit in 1998, with the first championship race following in 1999. Okayama International Circuit traditionally hosts the opening round of the Super GT season, with races typically covering 82 laps for a total distance of 303.646 kilometers. At the series' shortest circuits including Okayama, the 29-car GT500 field is divided into two groups for qualifying sessions due to the compact nature of the track. The circuit continues to be a major venue for Japanese domestic racing series including Super GT, Super Formula, and various motorcycle championships, maintaining its position as one of Japan's premier motorsport facilities.