Kei car - Wikipedia
Kei car, K-car, or kei jidōsha (軽自動車, lit. "light automobile") (pronounced [keːdʑidoːɕa]), is the Japanese legal category for the smallest and most limited power, highway-legal motor vehicles, including passenger cars (kei cars or kei-class cars), microvans, and Kei trucks (kei-class pickup trucks).