Okinawa Prefecture is the southernmost and westernmost prefecture of Japan. It has a population of 1,457,162 and a geographic area of 2,281 km2. Naha is the capital and largest city, with other major cities including Okinawa, Uruma, and Urasoe. Okinawa Prefecture encompasses two thirds of the Ryukyu Islands, including the Okinawa, Daitō and Sakishima groups, extending 1,000 kilometres southwest from the Satsunan Islands of Kagoshima Prefecture to Taiwan.