Ryukyu Kingdom
Ryukyu Kingdom was an independent kingdom which ruled the Ryukyu Islands from the 14th century to the 19th century. The King of Ryukyu unified Okinawa Island and extended its rule over the Amami Islands in modern Kagoshima Prefecture and the Yaeyama Islands near to Taiwan. Diplomatically the kingdom established tributary relations with China, during its Ming and Qing Dynasties, and developed trade relations with Japan, Korea and many Southeast Asian countries, including Siam, Pattani, Malacca, Champa, Hue, and Java. In 1609, the kingdom fell to an expeditionary force from Kagoshima. As Ming China prohibited trade with Japanese, the Lord of Satsuma utilized the kingdom as a puppet state for profitable trade with China. The King of Ryukyu also sent diplomatic missions to Edo, capital of feudal Japan. The modern Japanese government abolished the kingdom and established the prefecture of Okinawa in 1879. Qing China made some diplomatic protests to the Japanese government in vain.
Major events
Sources :
History of Okinawa (http://members.tripod.com/~MickMc/history.html)