Nakamura Ichiro, nicknamed "Ittsan", operates as a core member of the tuning shop Mechadoc alongside mechanics Jun Kazami and Kiyoshi Noro.

Ittsan distinguishes himself from his colleagues through his lack of mechanical aptitude and tuning expertise. His central role focuses on managing Mechadoc's financial operations, overseeing budgets, expenses, and monetary resources critical for the shop's daily functionality and racing endeavors.

Documented collaborative media projects designate the Honda City Turbo II under Ittsan's name, establishing his connection to this vehicle and highlighting his participation in the team's automotive activities despite his non-technical position.