Kei trucks were never intended for sale in America. Most are right-hand drive, and they do not always have airbags or other safety features required in new cars. The bulk are imported under a rule that allows non-compliant vehicles that are older than 25 years to be brought into America, a carve-out intended originally for collectible vintage cars, although a few specialist dealers import newer ones too, for sale as off-road vehicles. They fill a niche American manufacturers are failing to.

Source: Rural Americans are importing tiny Japanese pickup trucks