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 66 miles (106 km) long and an average 7 miles (11 km) 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 home to the prefectural seat of Okinawa Prefecture on the southwestern part of Okinawa Island. It has a humid subtropical climate. Okinawa is part of the Kyushu region.
Okinawans are among the longest living peoples in the world. Okinawans have less cancer, heart disease and dementia than residents in other parts of the world, while Okinawan women live longer than anywhere else on Earth.Okinawa has been a critical strategic location for the United States Armed Forces since 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.