Tokyo Xtreme Racer (東京エクストリームレーサー, Tōkyō Ekusutorīmu Rēsā), also known as Shutokō Battle (首都高バトル, Shutokōbatoru, lit.

Racers can freely roam the highways to challenge opponents, who are typically part of rival teams or lone "wanderers."

Winning races earn money, which can be used to upgrade the car's performance, enhance visual customization, or unlock new vehicles.

The series' progression system revolves around defeating specific rivals and bosses, ultimately culminating in showdowns with elite racers.

During the 1990s, Genki produced a highway drift/adult content (omitted in the localization Highway 2000) oriented Shutokou Battle spin-off series for the Sega Saturn, Wangan Dead Heat, and a circuit/tune edition unique episode for the PlayStation, Kattobi Tune, which oriented the Shutokou Battle series through a new direction, leading to the Dreamcast version and its worldwide recognition and distribution.

Kattobi Tune was compiled under the supervision of Rev Speed, a popular Japanese car tuning magazine and features seven licensed professional tuners, RE Amemiya, Spoon, Mine's, Trial, "RS Yamamoto", Garage Saurus and JUN Auto, appearing years later in Racing Battle: C1 Grand Prix and also in the influential Gran Turismo series by Polyphony Digital.

The franchise currently has three games, with two of them being released in North America under the Tokyo Xtreme Racer banner by Crave Entertainment.

The series, like the main Shutokou Battle games, includes licensed cars and authentic Japanese mountain roads as courses.

After all the Tricksters have been beaten, the main boss of the course (called the "Slasher") will challenge the player through an in-game BBS system.

The story unfolds in Kaido Battle when Hiroki Koukami challenges and defeat all Slashers, including Motoya Iwasaki, the Speed King from Shutokou Battle, until he challenges Hamagaki, the Kaido President & 1st Emotional King in his yellow Pantera GTS at Irohazaka.

To fix it, in Kaido: Tōge no Densetsu, Zoushigaya becomes the Miracles Summit and now drives a black Subaru Impreza Prototype Rally Car and Kyoichi Imaizumi, Zao's Slasher, becomes the Absolute Emperor and drives a white Renault Clio V6 Phase 2.

Genki was also developing a game related although not part of the Shotoku Battle series, The Fast and the Furious, based on the movie franchise of the same name.