土屋圭市
Taniguchi has gone through four cars with HKS for D1, between 2001 and 2005, the RS1 Hyper Silvia S15 (Crashed by Keiichi Tsuchiya, eventually rebuilt for 2002 and later revised as a backup car with a similar build to the RS2 in 2003, later bought by Rockstar Energy to be used in Formula D), and RS2 Hyper Silvia S15 (brought to HKS Europe), the Genki Racing Project Altezza, which was designed with off-the-shelf HKS parts, for the purpose that a private drifter could copy the car. He also drifts in Toyota Aristo (Lexus GS300 in US) for non-D1 events.