Donald Trump has approved the production of tiny Kei cars in the United States. These mini cars, popular in Japan, are half the size of a Ford F-150. Trump described them as “inexpensive, safe, fuel efficient and, quite simply, AMAZING!!!” He wants American manufacturers to start building them soon. Kei cars, known as "light vehicles," became popular in Japan after World War Two. They offer an economical solution for crowded city streets. However, in the US, these cars are rare and must be at least 25 years old to be driven legally. Nevi Bergeron, owner of a 1997 Suzuki Cappuccino Kei car, loves her small, eye-catching vehicle but does not find it safe for daily highway use. “On a highway next to big trucks, you definitely feel vulnerable,” she said. Andrew Maxon, founder of a Kei car club, drives his mini-coupe carefully, assuming others do not see him. US Transport Secretary Sean Duffy said small cars may not suit highways but could work well in cities. Trump’s push also aims to lower vehicle prices, offering affordable options for Americans. Still, challenges remain. Car prices have risen due to chip shortages and tariff policies. Hyundai's chairman Chung Eui-sun warned of trade tensions this year impacting the car industry. Sales may drop below 16 million due to price worries and weak EV demand, especially among low-income buyers. Some manufacturers are cautious. Fiat’s owner Stellantis plans to sell a small Topolino car soon. Nissan and Mitsubishi have not decided on bringing Kei cars to the US. Major makers like Toyota, Honda, and Suzuki gave no comments. Investor Steve Greenfield doubts Kei cars will succeed widely. Meeting US safety rules would require costly redesigns that remove their main benefits. Previously, small car makers like Smart failed due to low demand. Kei cars mainly remain niche products for enthusiasts and some city or farm use, says importer Mo Sulai. Despite Trump’s announcement boosting awareness, he expects the market to stay small because Americans prefer big cars.