Kei cars are a category of small, lightweight vehicles in Japan, designed to meet specific regulations for size and engine capacity. They typically have a maximum length of 3.4 meters, a width of 1.48 meters, and an engine displacement of up to 660cc. These cars are popular for their compact size, making them ideal for urban driving and parking in crowded areas. Due to their small size and efficient engines, Kei cars often enjoy lower taxes and insurance costs compared to larger vehicles. They are available in various styles, including hatchbacks, vans, and trucks, catering to diverse consumer needs while promoting fuel efficiency and affordability.