If it’s legal for BMW to import it’s cars and sell them, then it should be legal for Toyota to import it’s kei cars and sell them in the US right? You just can’t do it as an individual.
I would suspect that Japanese kei cars would not pass the safety requirements. Road speeds really are much slower over there. IIRC, the warning alarm on my kei car in the 90s would go off if I exceeded 90 km/h (about 55 mph).
The highways speeds are the same though. I drove a kei car on the highway in Japan. It was fine, but not a great driving experience. I wouldn't have wanted to drive a regular/full sized American car in Japan though, the roads are really narrow.
