First, the International Hydro-graphic Organization(IHO) has tentatively approved a proposal that supports the exclusive use of the name ¡°Japan Sea,¡± or" the Sea of Japan", in referring to the waters between Japan and the Korean Peninsula only by the side of Japanese government, and it's totally not fair.
Second, our country, South Korea has been calling for the adoption of the alternative name ¡°East Sea,¡± because the name ¡°Japan Sea¡± was use under Japan¡¯s colonial rule of the Korean Peninsula."East Sea" sounds totally neutral comparing to "Japan Sea", so we should use the East Sea as the name of the sea between two countries.
Your country has argued ¡°Japan Sea¡± is the only internationally established name and there is no need to change it. I am really regretful to see your argument so that I strongly ask you to change your attitude towards this issue.
The issue of Japan sea only causes a diplomatic problem between South Korea and Japan.