High Quality Content by WIKIPEDIA articles! The international name for the body of water which is bordered by Japan, North Korea, Russia, and South Korea is disputed. The Japanese government supports the use of the name "Sea of Japan", while South Korea supports the name "East Sea", and North Korea supports the name "East Sea of Korea". Currently, most international maps and documents use either the name Sea of Japan (or equivalent translation) by itself, or include both the name Sea of Japan and East Sea, often with East Sea listed in parentheses or otherwise marked as a secondary name.