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The kingdom was first granted an official seal by the [[Hongwu Emperor]] of the Ming Dynasty in the 1370s, following the kingdom of [[Chuzan|Chûzan]] sending a formal tribute mission for the first time in [[1372]].

The kingdom was first granted an official seal by the [[Hongwu Emperor]] of the Ming Dynasty in the 1370s, following the kingdom of [[Chuzan|Chûzan]] sending a formal tribute mission for the first time in [[1372]].

The seal was of a style known as "camel-back," as it had a grip shaped like a camel's hump. Like those issued to Vietnam, Siam, and

The seal was of a style known as "camel back," as it had a grip shaped like a camel's hump. Like the "camel back" seals issued to Vietnam, Siam, Java, and certain other kingdoms, it was made of gilded silver. This was in contrast to the seals bestowed upon the kings of [[Joseon]] dynasty Korea and the [[Muromachi shogunate|Muromachi shoguns]] (as "king of Japan"), which were solid gold, with grips in the shape of turtles.<ref>Akamine Mamoru, Lina Terrell (trans.), Robert Huey (ed.), ''The Ryukyu Kingdom: Cornerstone of East Asia'', University of Hawaii Press (2017), 128.</ref>

Crown Prince [[Sho Tei|Shô Tei]] journeyed to China in [[1654]] and returned the royal seal bestowed upon the kingdom by the Ming, receiving an official seal from the Qing in its place.<ref>Angela Schottenhammer, “Empire and Periphery? The Qing Empire’s Relations with Japan and the Ryūkyūs (1644–c. 1800), a Comparison.” ''The Medieval History Journal'' 16, no. 1 (April 1, 2013): 176-179.</ref>

Crown Prince [[Sho Tei|Shô Tei]] journeyed to China in [[1654]] and returned the royal seal bestowed upon the kingdom by the Ming, receiving an official seal from the Qing in its place.<ref>Angela Schottenhammer, “Empire and Periphery? The Qing Empire’s Relations with Japan and the Ryūkyūs (1644–c. 1800), a Comparison.” ''The Medieval History Journal'' 16, no. 1 (April 1, 2013): 176-179.</ref>