The D1 Grand Prix (D1グランプリ D1 guranpuri), abbreviated as D1GP and subtitled Professional Drift, is a production car drifting series from Japan. After several years of hosting amateur drifting contests, Daijiro Inada, founder of Option magazine and Tokyo Auto Salon, and drifting legend, Keiichi Tsuchiya, hosted a professional level drifting contest in 1999 and 2000 to feed on the ever increasing skills of drifting drivers who were dominating drifting contests in various parts of Japan. In October 2000, they reformed the contest as a five-round series. In the following year for the following round, the introduction of the two car tsuiou battle, run in a single-elimination tournament format, a common tradition for tōge races which became popular with car enthusiasts.

Since then, the series has spread from the United States to United Kingdom and Malaysia to New Zealand with an ever increasing fanbase all over the world.[citation needed] The series has become a benchmark for all drifting series as its tsuisou format became widely adopted in drifting events throughout the world and is the most highly regarded of all series.[citation needed] The series helped to turn not just its personnel but also many of its drivers into celebrities with appearances in TV shows and car magazines all over the world along with scale models and video game appearances for their cars. It was credited for the increase several-fold in tuning businesses specialising in drift set-ups.

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