what we know as Sea of Japan should be changed to East Sea or Sea of Korea to justify the independence of islands.

For justification, because the sea is called Sea of Japan, Japanese are claiming that island in Sea of Japan is theirs; even though historical and their own writing says they are ours, especially DokDo. DokDo is Korea's land; not Japans, and to find the right and independence, we need to change Sea of Japan to East Sea or Sea of Korea. That way, world will call the end of Japan's slavery act since World War II.