The following 1796 map shows Ulleungdo as Korean territory, labeled as both "Ulleungdo" (蔚陵島) and "Usando" (亐山島). It also shows Takeshima (竹島) and Matsushima (松島) as Japanese territory. Takeshima was the name the Japanese used for Ulleungdo, and Matsushima was the name they used for Liancourt Rocks (Dokdo). In Korean, the Chinese character 亐 has two pronunciations: 울/ul/ and 우/u/.
Can anyone give me more information on the map. I found the link to the map HERE, and you can find the map, itself, HERE. I think we have already talked about this map before, but I cannot find the post. HERE is information on the map, but it is in Japanese.