Usui Pass

Usui Pass (碓氷峠 Usui-tōge) is a mountain pass that lies between Nagano and Gunma Prefectures in Japan. It has served as one of the major transportation routes in central Japan since at least the eighth century. It was featured in numerous Initial D episodes as the home course of Impact Blue. It is also the home course of the real life drift racer Keiichi Tsuchiya.