JA56 YEARBOOK2004 JAPANESE ARCHITECTURAL SCENE IN 2004 work Kojun Bulding location Chuo-ku, Tokyo architects Simizu Corporation structural engnieers Simizu Corporation mechanical engineers Simizu Corporation general contractor Simizu Corporation site area 2,054.020m2 building area 1,878.460m2 total floor area 22001.879m2 structure below grade; steel above grade; reinforeced concrete; 2 basements, 10 sotries, and 2stories penthouse pricipal use social club, office, shop completion date September, 2004 next back top