Okayama International Circuit is a 2.973-mile track located at the base of the foothills of the Hijiriyama Mountain in Okayama, Japan. It features 18 twisty turns and long straights, making it an ideal location for testing a variety of race cars.
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Nearest track of a similar category is Suzuka (211 kilometers away).
The Okayama International Circuit is located on Japan's Kagawa Island and was designed by a team of engineers led by F1 track architect Hermann Tilke.
The circuit is 2.3 miles long and has 12 turns.
It hosted its first race in 1992, when F1 legend Ayrton Senna won the first Okayama 500.
The circuit has hosted the Japanese round of the World Superbike Championship since 1998.
The circuit was also the venue for the Super GT series every year between 1992 and 2000.
The main straight at the circuit is over a kilometre long and is one of the longest straights of any race track in the world.
The track has hosted other major events such as the Formula Nippon, the Formula Toyota and the All-Japan Superbike Championship.
The circuit was used as the test track for the original Nissan Skyline GT-R.
The highest speed achieved on the track was by F1 driver Mika Hakkinen in 1998 when he clocked in at nearly 200 mph.
The circuit is known for its smooth surface and high grip levels that makes it one of the most challenging and exciting tracks in the world to drive.