Takumi Fujiwara eventually joins Ryousuke and Keisuke Takahashi to form "Project D," with a dual purpose in mind: Ryousuke wants to develop his "High-Speed Street Racing Theory," while Keisuke and Takumi want to improve their driving talents by competing against formidable opponents on perilous routes. Project D's goal is to challenge street racing teams from other prefectures to beat their uphill and downhill records. Ryousuke establishes a special website to publicize Project D's forthcoming clashes and post the team's successes in order to capture the attention of the finest racing teams. The fourth season of Initial D follows the members of Project D as they strive to become the finest street racing team outside of Gunma Prefecture.