Exclusive economic zone of Japan
Japan has the eighth largest Exclusive Economic Zone (EEZ) in the world. The total area of Japan is about 377,973.89 km². Japan's EEZ area is vast and the territorial waters (including: the Seto Inland Sea) and EEZ together is about 4.48 million km².
Megalopolis
Japan is made up of overlapping megapolises. The Taiheiyō Belt megapolis itself includes both the Greater Tokyo Area and Keihanshin megapoles.
Western Region Supercity of Colombo (Megapolis) with 3,687 km land area and currently over 7 million population comprising several municipal, urban, and town councils politically. This is planned to be spacious and modern megacity with dedicated core zones for financial, trade, industrial, educational, logistic, transport, health, sports, recreational activities and services in par with the international level. Once completed it would be one of the most livable and favored cities in the world.