Japan is an archipelago of over 3,000 islands located in East Asia. It has a population of over 127 million people, most of whom live in urban areas on the main islands of Honshu, Hokkaido, Kyushu and Shizuoka. Some of Japan's largest cities are Tokyo, Osaka and Nagasaki. Japan has a long history of dealing with natural disasters like earthquakes, tsunamis and volcanic eruptions of Mount Fuji due to its geographic location. It has implemented extensive coastal defenses and early warning systems to help protect against tsunamis.