noun
Ryukyu Kingdom
Historical term for the kingdom that ruled the Ryukyu Islands from the 15th to 19th century, before annexation by Japan.
琉球王国は、中国や日本と貿易を行っていた。
The Ryukyu Kingdom traded with China and Japan.
From 琉球 (Ryukyu, the island chain) + 王国 (kingdom).