Okinawa Island (沖縄本島, Okinawa-hontō, alternatively 沖縄島, Okinawa-jima; Okinawan: 沖縄/うちなー, Uchinaa or 地下/じじ, jiji; Kunigami: ふちなー, Fuchináa) is the largest of the Okinawa Islands and the Ryukyu (Nansei) Islands of Japan in the Kyushu region. It is the smallest and least populated of the five main islands of Japan. The island is approximately 106 kilometres (66 mi) long, an average 11 kilometres (7 mi) wide, and has an area of 1,206.98 square kilometers (466.02 sq mi). It is roughly 640 kilometres (400 mi) south of the main island of Kyushu and the rest of Japan. It is 500 km (300 mi) north of Taiwan. The total population of Okinawa Island is 1,384,762. The Greater Naha area has roughly 800,000 residents, while the city itself has about 320,000 people. Naha is the seat of Okinawa Prefecture on the southwestern part of Okinawa Island. Okinawa has a humid subtropical climate.
Okinawa has been a critical strategic location for the United States Armed Forces since the Battle of Okinawa and the end of World War II. The island hosts around 26,000 US military personnel, about half of the total complement of the United States Forces Japan, spread among 32 bases and 48 training sites.