Japan is the 11th most populous country in the world and has a population of nearly 126 million. Tokyo is the most populous metropolitan area – home to more than 37 million residents. It comprises about 6,852 islands. The main 5 being Hokkaido, Honshu, Shikoku, Okinawa and Kyushu.
Nearly 73 percent of Japan is mountainous and thus unsuitable for agricultural or residential purposes. Due to this, the coastal areas have very high population densities.