The IHO and the United Nations Group of Experts on Geographical Names or UNCSGN, the international organizations which determine the standard names of the world¡¯s seas, suggest that in the hard case on the agreement of a name for a landmark shared by 2 countries, it is ordinary principle to use each working name.
Following this, the current name for the sea between Korea and Japan should not have just one name decided on but the joint use of the Korean name ¡°East Sea¡± and the Japanese ¡°Sea of Japan¡± name together in accordance with international law.
Most of all, the U.S. state of Virginia has revised the guidelines for history and social science education in line with a newly enacted law that requires textbooks to use the Korean name ¡°East Sea¡± alongside the Japanese name ¡°Sea of Japan¡± for the body of water between the two countries on 2017.
I would like you to understand this matter should be treated in accordance with the international standard and hope to hear from you soon
Thank you very much