Why are JDM cars (Japanese Domestic Market) Illegal? They are illegal because they are right-hand drives for driving on the left side of the road. There are other reasons why like how they are constructed and how they react to crashes. What? And this is more illegal than possession of drugs or an automatic weapon!? I believe that cars like the R32 Godzilla, Mk4 Supra, and the Ae86 have no problem with being legal. There is no point in legalizing a car from another state for just the way they are built. They are built beautifully and have nothing against being illegal. People need self-control and not to drift around the streets. (as much as I want to) That is my point and my point proved why Japanese Domestic Market cars should be Legal in the United States. I hope this proved enough to get them in with us.