Certain Japanese cars, particularly those intended for the domestic market, adhere to a voluntary speed limit of 180 km/h (approximately 112 mph). This restriction stems from a long-standing agreement among Japanese automakers, prioritizing road safety and minimizing high-speed accidents. This self-imposed limit reflects a cultural emphasis on responsible driving. While export models often lack this restriction, it's a common feature in domestic vehicles. When dealing with japanese car dealers, especially those specializing in imported used vehicles, it's crucial to understand these specifications. The limit doesn't necessarily indicate poor performance, but rather a focus on safety and regulatory compliance within Japan.