Since the East Sea region is a sea area adjacent to four countries including South Korea, North Korea, Japan, and Russia, it is not correct to name the sea area according to only one of the countries concerned, and it is necessary to find a name that all of the countries concerned can agree on. If this is not possible, it is appropriate to write the name used by the country concerned.
Japan seized the sovereignty of the Republic of Korea in 1900, colonized and began to rule. After the annexation of Korea and Japan in 1910, IHO published the first edition of the boundary line between the sea and the sea in 1929, and name of East sea was written as the Sea of Japan. At that time, it was decided by Japan's assertion while the Republic of Korea was invaded by sovereignty and Korea was excluded. The geographical name for a feature shared by two or more countries is generally determined through consultation between the countries concerned. These general principles of mapping are also confirmed by the resolutions of the International Hydrographic Organization (IHO) and the United Nations Conference on the Standardization of Geographical Names (UNCSGN). In addition, the East Sea area falls under the ¡°semi-enclosed sea¡± defined by Article 122 of the UN Convention on the Law of the Sea.
The Korean government has a basic position that it should be marked as East sea alone, but until an agreement is reached with Japan claiming the Sea of Japan, East Sea and Sea of Japan must be added together. For the above reasons, please change Sea of Japan to be used as East Sea also.