Korea Ulleungdo Dokdo islets , but in Japan 's Oki Island are not visible . The land Usanguk Silla in AD 512 after Dokdo was Korea 's own territory . The territory of South Korea 's Usanguk territory was an umbrella until the late 19th century , the name of Dokdo was the fact that Dokdo is clearly prove that .
Hayashi during Japan's silhakja Hay Green " Three Kingdoms ground and asks ," Chosun kingdom evangelism " Green " Finally , the French geographer dangbil Ulleungdo and Dokdo drawn very close to the east coast that can be seen in Japan, Korea, yellow was painted green . Ulleungdo and Dokdo ' Shipbuilding ' clearly marked to set .



