琉球族
In 1872 the Ryukyu Kingdom was reconfigured as a feudal domain ("han"). The people were described as appearing to be a "connecting link" between the Chinese and Japanese. After the Taiwan Expedition of 1874, Japan's role as the protector of the Ryukyuan people was acknowledged; but the fiction of the Ryukyu Kingdom's independence was partially maintained until 1879. In 1878 the islands were listed as a "tributary" to Japan. The largest island was listed as "Tsju San", meaning "middle island". Others were listed as Sannan in the south and Sanbok in the North Nawa. The main port was listed as "Tsju San". It was open to foreign trade.