In 2006 the D1 Grand Prix championship, a drifting motor racing competition, comprised eight rounds held in Japan and the United States. The overall winner was Nobushige Kumakubo. There was also a D1 Street Legal competition run over seven rounds in Japan, and national competitions in Malaysia and the United Kingdom. Changes for the 2006 season An extra 1 point is now awarded to the driver who manages to earn a perfect score of 100.0 during a 100pt tansou (solo run) round from the judges. Jyuri Tamashiro replaces Hatsuno Sugaya as a D1 Gal. The D1SL debuts as a full championship season. The two national series (D1GB, United Kingdom; and D1MY, Malaysia debuts as full-championship seasons). Introduction of four regional D1SL series in Japan, which awards the winners a D1 License. 2006 schedules n.b. Winning Driver are mentioned on the right 2006 D1 Grand Prix Point Series Round 1 - March 3/4 - Irwindale Speedway, Irwindale, California, United States - Yasuyuki Kazama (S15) Round 2 - April 29/30 - Sports Land SUGO, Miyagi Prefecture, Japan - Ken Nomura (ER34) Round 3 - May 13/14 - Fuji Speedway, Shizuoka Prefecture, Japan - Yasuyuki Kazama (S15) Round 4 - July 29/30 - Autopolis, Ōita Prefecture, Japan - Ken Nomura (ER34) Round 5 - August 26/27 - Ebisu South Course, Fukushima Prefecture, Japan - Nobushige Kumakubo (GDB) Round 6 - September 9/10 - Suzuka Circuit, Mie Prefecture, Japan - Hideo Hiraoka (S15) Round 7 - October 21/22 - Fuji Speedway, Shizuoka Prefecture, Japan - Masato Kawabata (S15) Round 8 - December 15/16 - Irwindale Speedway, Irwindale, California, United States - Kazuhiro Tanaka (GDB) 2006 D1 Street Legal Series Round 1 - February 4/5 - Sekia Hills, Kumamoto Prefecture, Japan - Masao Suenaga (FD3S) Round 2 - April 15/16 - Ebisu South Course, Fukushima Prefecture, Japan - Masao Suenaga (FD3S) Round 3 - April 29/30 - Sports Land Sugo, Miyagi Prefecture, Japan (D1GP Week) - Toru Inose (S15) Round 4 - May 13/14 - Fuji Speedway, Shizuoka Prefecture, Japan (D1GP Week) - Hiroyuki Fukushima (PS13) Round 5 - July 29/30 - Autopolis, Ōita Prefecture, Japan (D1GP Week) - Kazuyoshi Okamura (S15) Round 6 - August 26/27 - Ebisu, Fukushima Prefecture, Japan (D1GP Week) - Yoshinori Koguchi (JZX100) Round 7 - November 11/12 - Sekia Hills, Kumamoto Prefecture, Japan - Tetsuya Hibino (S14) Exhibition Rounds Exhibition RD-1 June 17/18 - Silverstone, Silverstone, Northamptonshire, UK -