Intensive advertisement towards abroad is required for the international use of East Sea, which is now only used in the textbook. It is also significant since there is an opportunity to unify internationally Sea of Japan and East Sea, which are used for the same sea. The sixth conference on standardization of geographic names held in the UN headquarter in New York in Aug. 28, 1992 was the first international conference where internationally accepted name for East Sea, which is now Sea of Japan, was brought to the discussion in the governmental level. Bilateral cooperation between corresponding countries and multilateral cooperation among neighbor countries for the reasonable resolution should be considered. For international relations ask understanding of the other¡¯s interests and position for the peaceful solution.Also, the excavation and study on the historical records,