Highways in Japan are a master piece and driving on them is not only sight to see but a privilege. Just owning a vehicle in Japan comes with many hurdles. For one the nation utilizes a bi-annual mechanical inspection to keep those on the road up to par. Along side this hefty expense is an annual road tax and less we forget parking for you fine auto.
Perhaps a little discouraging but at the same time an eye opener. Japan is an expensive nation when it comes to propelling anything on 4 wheels. Perhaps its this way to prevent vehicle ownership getting carried away, its just an island after all.