East Sea was originally Korean land because, generations before it was the Koreans who owned that territory not japanese

Long ago the so called Sea of Japan was originally known as the East Sea for it was the territory for the generations of the Korean People, but due to the "support and resources" given by Japan, it covers up the fact that Japan stole the territory from Korea and changed its name to Sea of Japan. Ask any person from Korea they would know that the Sea of Japan was known originally as the East Sea, but of course the Japanese would reject it, which is a lie.