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 Sakis…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. Okinawa Prefecture's largest island, Okinawa Island, is the home to a majority of Okinawa's population. Okinawa's indigenous ethnic group is the Ryukyuan people, who also live in the Amami Islands of Kagoshima Prefecture.