Portal:Japan/Geography/Selected prefecture/47

Okinawa Prefecture is one of Japan's southern prefectures, and consists of hundreds of the Ryukyu Islands in a chain over 1,000 km long, which extends southwest from Kyūshū (the southwesternmost of Japan's main four islands) to Taiwan. Okinawa's capital, Naha, is located in the southern part of the largest and most populous island, Okinawa Island, which is approximately half-way between Kyūshū and Taiwan. The disputed Senkaku Islands (Mandarin: Diaoyu Islands) are also administered as part of Okinawa Prefecture at present. The oldest evidence of human existence in the Ryukyu islands was discovered in Naha and Yaese. Some human bone fragments from the Paleolithic era were unearthed, but there is no clear evidence of Paleolith remains. Japanese Jōmon influences are dominant in the Okinawa Islands, although clay vessels in the Sakishima Islands have a commonality with those in Taiwan. The first mention of the word Ryukyu was written in the Book of Sui. This Ryukyu might refer to Taiwan, not the Ryukyu islands. Okinawa was the Japanese word depicting the islands, first seen in the biography of Jianzhen, written in 779. Agricultural societies begun in the 8th century slowly developed until the 12th century. Since the islands are located in the center of the East China Sea relatively close to Japan, China and South-East Asia, the Ryūkyū Kingdom became a prosperous trading nation. Also during this period, many Gusukus, similar to castles, were constructed. The Ryūkyū Kingdom had a tributary relationship with the Chinese Empire beginning in the 15th century.