Ryukyu Kingdom

The Ryukyu Kingdom was a kingdom in the Ryukyu Islands from 1429 until 1872, when it was reorganized as the Ryukyu Domain, before being fully abolished in 1879. It was ruled as a tributary state of the Ming dynasty by the Ryukyuan monarchy, who unified Okinawa Island to end the Sanzan period, and subsequently extended the kingdom to the Amami Islands and Sakishima Islands. The Ryukyu Kingdom played a central role in the maritime trade networks of medieval East Asia and Southeast Asia despite its small size. The Ryukyu Kingdom became a vassal state of the Satsuma Domain of Japan after the invasion of Ryukyu in 1609 but retained de jure independence until it was transformed into the Ryukyu Domain.