Unfortunately, I found out some wrong mark in your post, that the ¡°East Sea¡± was named as the ¡°Sea of Japan.¡± The archipelago of Korea and Japan, currently named as the 'Sea of Japan' in your map, should be corrected to the 'East Sea'. It seems unreasonable to use the name "Sea of Japan" because it was decided in the period of imperialism and it has its original name, "East Sea", which has been used throughout history. Also, many international organizations including U.N. agencies have corrected ¡°Sea of Japan¡± to ¡°East Sea.¡±
Yours sincerely,
Kyu-bee Ham