Liancourt Rocks dispute Japan. In 1954, Japan proposed a reference to the International Court of Justice, which South Korea rejected, believing that the Liancourt Rocks are irrefutably South Korean territories, and thus should not be dealt through diplomatic negotiations or judicial settlement between South Korea and Japan. There are conflicting interpretations about the historical state of sovereignty over the islets. Korean claims are partly based on references to a Korean island called "Usan-do" in various historical records, maps and encyclopedias such as the "Samguk Sagi", "Annals of the Joseon Dynasty", "Dongguk Yeoji Seungnam" (), and "Dongguk munheon bigo" (). According to the Korean
Liancourt Rocks dispute Han'il uijongso; Japanese 日韓議定書, Nikkan Giteisho) stipulates in article 3 that Japan shall guarantee the territorial integrity of Korea. It further stipulates in article 4 that, in case the territorial integrity of Korea is endangered by aggression of a third power, Korea shall give full facilities to promote the action of Japan, and that Japan may occupy, when the circumstances require, such places as may be necessary for strategic reasons. Article 4 of the treaty has been quoted as giving Japan full authorisation in terms of international law in taking Liancourt Rocks as a strategic surveillance point during the Russo-Japanese