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 Peace Treaty came into force on April 28. On July 18, 1952, South Korea issued a presidential order to seize all illegal foreign vessels engaging in fishing in breach of the Peace Line. On May 23, 1952, in a Foreign Affairs committee meeting held in the House of Representatives, Ishihara, Vice-minister of Foreigner Affairs acknowledged MOFA's intention regarding the designation of Liancourt Rocks as bombing range for Occupation Forces in response to a question raised by Yamamoto, a Diet member from the Shimane constituency: ""[To] help Japan get confirmation of its territorial sovereignty over the island."" On September 15, 1952,