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Keiichi Tsuchiya (土屋圭市, Tsuchiya Keiichi, born January 30, 1956) is a Japanese professional race car driver. He is known as the Drift King (ドリキン, Dorikin) for his nontraditional use of drifting in non-drifting racing events and his role in popularizing drifting as a motorsport. In professional racing, he is a two-time 24 Hours of Le Mans class winner and the 2001 All Japan GT Championship runner-up. He is also known for touge driving.

The car he drives, a Toyota AE86 Sprinter Trueno, has become one of the most popular sports cars; the car is also known as "Hachi-Roku" in Japan (hachi-roku meaning "eight six"); his car is also called "The Little Hachi that could." A 2-part video known as 'The Touge' produced by Pluspy documents Tsuchiya's touge driving with his AE86.

He was a consultant for the popular manga and anime series, Initial D, of which the main character Takumi Fujiwara is a character which describes him. He also served as a stunt coordinator and stuntman on The Fast and the Furious: Tokyo Drift, where he also made a cameo appearance.