Your name called, and the Sea of Japan from late 18th century the maritime area and essential to separate the northern Pacific Ocean area name he said. However, this is clearly a wrong argument.
First, the name Sea of Japan was built when national sovereignty is of the Republic of Korea had stolen in Japan. Therefore, there was no agreement on the name.
Second, historically, when Koreans with this name in 2000, more than 100 years of history because it is a name that called on the basis of the Sea of Japan is unjustified.