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.
Tatami
In Japan, the size of a room is often measured by the number of , about 1.653 square meters (for a standard Nagoya size tatami). Alternatively, in terms of traditional Japanese area units, room area (and especially house floor area) is measured in terms of "tsubo," where one "tsubo" is the area of two tatami mats (a square); formally 1 "ken" by 1 "ken" or a 1.81818 meter square, about 3.306 square meters.