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 79 million vehicles run on the Japan's roads.
Road Category    Length    
   (thousand km)		     Paved Ratio
    (% of length)
       National Expressways             8.0            100
       National Highways            55.0             99
       Prefectural Roads          129.0             96
       Municipal Roads       1,012.0             77
Total       1,204.0             80
(at the end of March 2008)