Although I am against street racing, Japan's street racing is a whole different thing. Everyone there can drive very good(at least better than 90% of American drivers), and the regular drivers don't get road rage like they do here. On the highways, if they see cars coming, they move over. On the mountains, there is no cars, because people don't really use them for transportation. It's still illegal, but the chances of something bad happening aren't much worse than while driving around normally. I mean, how much videos can you find of a street racer in japan crashing? Then how about street racers in America? Also, the cars aren't going to get messed up, most of then don't have over 60,000km on them, and they get a full inspection of the cars every 3 years, where they check everything about the car, not just if the headlights work or the tire tread.