The Bridge of Nations
The great bell at Shuri Castle bore an inscription: Ryukyu was the "Bridge of Nations," connecting the lands of the South Sea to the realms of the north. This wasn't mere rhetoric. In the fifteenth and sixteenth centuries, Ryukyuan ships carried goods between Siam, Malacca, Java, China, Korea, and Japan. Shuri maintained formal tributary relations with the Ming dynasty while quietly trading with Japanese lords who were technically restricted from direct contact with China.
The Silk Trade
Chinese silk was the prize. The Ming, and later the Qing, permitted Ryukyu to conduct tribute trade at Fuzhou—the only legitimate channel for importing Chinese goods into the Japanese market. Ryukyuan merchants bought silk in Fuzhou and sold it in Kagoshima or Osaka at substantial markups. The Shimazu lords of Satsuma, who established control over Ryukyu in 1609, allowed the kingdom to continue its China trade precisely because it was too profitable to suppress. This dual relationship—with both China and Japan—made economic sense for all parties.
The Sugar Economy
Sugar transformed the southern islands. Introduced from China in the seventeenth century, cane cultivation spread rapidly through the Ryukyu chain. Satsuma demanded sugar as tribute, then commercialized it for sale in Osaka. The Yaeyama and Miyako islands became centers of sugar production, with island communities increasingly organized around the crop. By the nineteenth century, sugar had joined silk as a major source of regional revenue. The "Bridge of Nations" had added another valuable commodity to its portfolio.