Sea Of Japan international activities to the Japanese occupation they did not do the situation of our nation using the nomination short of history determined unilaterally by Japan. (In addition, the name of one country about the sea and shares its borders to be chosen by nomination broken that agreement.)
In other words, the Sea of Japan is the remains of Japanese imperialism. So it will be a dangerous marking when we wirte to Japanese sea.

And there is another reason why we should not  mark the Japanese sea. According to international practice, the name of the ocean is generally followed by the name of the left continent of the relevant waters, and as Japan claims, naming after the Japanese archipelago on the right is not in line with the general international practice. The name as captain of our country, located on the left of the continent in accordance with international practices provided to East sea can be said to be a proper name.

These are several reasons why we mark the East Sea.