The Ryukyu Kingdom was an independent kingdom that existed from the 15th to the 19th century, located in the Ryukyu Islands of Japan. It was known for its unique culture, language, and trade relationships with neighboring countries, including China and Japan. The kingdom's capital was Shuri, where the famous Shuri Castle served as the royal palace. The Ryukyu Kingdom thrived on maritime trade, exporting goods like sugar and textiles. Its strategic location made it a cultural melting pot, blending influences from Chinese, Japanese, and Southeast Asian cultures. In 1879, the kingdom was annexed by Japan, marking the end of its sovereignty.