The circuit was opened in 1990 as a private motor racing track intended for the use of affluent individuals. Shortly after its opening, it hosted its first organized race, featuring veteran British drivers. The track’s initial name, “TI Circuit Aida,” stemmed from “Tanaka International,” a reference to Hajime Tanaka, the owner of the golf club on whose land the circuit was built. The official name at the time was “TI Circuit Aida.”
In 1994 and 1995, Okayama International Circuit, then operating as TI Circuit, hosted the Formula One Pacific Grand Prix. Michael Schumacher won both events, marking early successes in his championship-winning career. These races briefly positioned Japan as one of only nine countries to host more than one Formula One event in a single year; a second Japanese race at Autopolis was planned for 1993 but ultimately did not occur. The Pacific Grand Prix was discontinued primarily due to the circuit’s remote location. In 1996, plans to host a round of the International Touring Car Championship were made, but the race was ultimately moved to Suzuka Circuit). The Japanese Touring Car Championship also ran at the circuit between 1992 and 1995, and again from 1997 to 1998.
The corpus does not provide specific details about the geometry or characteristics of any particular corner at Okayama International Circuit. However, the first turn was the site of a fatal incident in 1999.
In 1999, Shingo Tachi, the defending JGTC GT300 champion, was killed during testing in a GT500 Toyota Supra when a technical failure prevented him from slowing down for the first turn. This incident occurred less than a year after Tetsuya Ota suffered a severe, fiery accident at Fuji Speedway. The Tachi incident prompted a review of safety measures at the circuit, though the specific changes are not detailed in the corpus. In 2003, the Tanaka International Company, the parent company of the circuit, applied for civil rehabilitation. Unimat Holding Co., Ltd. provided financial support to keep the facility operational. The company was subsequently renamed Okayama International Circuit Co., Ltd. in 2004, and the circuit itself was renamed Okayama International Circuit on January 1, 2005.
The death of Shingo Tachi in 1999, caused by a technical failure preventing him from slowing for the first turn, led to a review of safety protocols at the circuit. The corpus does not detail the specific changes made in response to this tragedy.
Okayama International Circuit has hosted a diverse range of racing series beyond Formula One. Currently, the circuit hosts events for Super GT, Ferrari Challenge Japan, Porsche Carrera Cup Japan, Super Formula Lights, F4 Japanese Championship, GT World Challenge Asia, Japan Cup Series, MFJ Superbikes, and Super Taikyu. Previously, the circuit hosted rounds of the Asian Le Mans Series (including the 1000 km of Okayama in 2009), Formula BMW Pacific (2009–2010), Formula Toyota (2005–2006), Formula V6 Asia (2008), Japan Le Mans Challenge (2006–2007), TCR Japan Touring Car Series (2019–2020, 2022–2023), and the FIA World Touring Car Championship (2008–2010). The WTCC race in 2008 marked the first FIA world championship race held at the circuit since 1995. However, Suzuka Circuit) subsequently took over hosting the Japan round of the WTCC in 2011. The Formula Regional Japanese Championship ran at the circuit from 2020 to 2025.
As of August 2025, the fastest official race lap record at Okayama International Circuit remains unofficial, set by Ayrton Senna in 1994 during qualifying for the Pacific Grand Prix, with a time of 1:10.218 in a Williams FW16. The circuit was sold to Aska Corporation, an auto parts manufacturing company, on March 3, 2012. Currently, the circuit continues to host a variety of motorsport events and remains a significant venue for racing in Japan.