All Japan Grand Touring Car Championship is a grand touring car racing series that began in 1993. Originally titled as the Zen Nihon GT Senshuken (全日本GT選手権), generally referred to as either the JGTC the series was renamed to Super GT in 2005. It was the top level of sports car racing in Japan. The series was sanctioned by the Japan Automobile Federation (JAF) and ran by the GT Association (GTA). Autobacs has served as the title sponsor of the series since 1998.