Japan Road Contractors Association
Statistics
Japan has 378,000 km2 of land, about 70% of which is more or less mountainous.
More than 120 million people live in a country with one of the highe stpopulation densities in the world.More than 78 million vehicles run on the Japan's roads.
Road Category    Length    
   (thousand km)		     Paved Ratio
    (% of length)
       National Expressways             7.6            100
       National Highways            54.8             99
       Prefectural Roads          129.4             96
       Municipal Roads       1,016.1             77
Total       1,207.9             80
(at the end of March 2009)