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.
Great Lakes Megalopolis
According to the Brookings Institution, if it stood alone as a country, the economy of the Great Lakes region which includes most of the Great Lakes Megalopolis, would be one of the largest economic units in the world (with a $4.5-trillion gross regional product), roughly equal to that of Japan. The five Great Lakes contain one-fifth of the world's surface fresh water and have a combined shoreline of 10,210 miles (17,017 km). About 200 million tons of cargo are shipped by way of the Great Lakes each year.