This article aims to identify possible changes in the East Asian unequal treaty system in the early 1880s. In 1880, Korea confirmed that China and Japan had suffered from economic damage due to the loss of 5 percent import duty rate and tariff autonomy, and that Japan was preparing the Western powers to revise treaties. Therefore, Korea drafted a treaty that guaranteed the tariff rate of 10% on major imports and Korea’s tariff autonomy based on Japan’s draft of a treaties revision toward Western powers. China, which mediated the settlement of the treaties between Korea and Western powers, secured Korea with an import tariff rate of 10–30 % and tariff autonomy. However, China applied a 5 percent import tariff to Korea, which was in effect in...