Dokdo is a small rock island in the southeast of the East sea and consists of 91 islands, big and small. Japan has long been arguing Dokdo for their territory because of valuable resources under it. It is definitely absurd. South Korea has known the existence of Dokdo since a very long time ago and numerous historical documents support this. For example in Samguksagi, one of the oldest historical book in Korea, it is recorded that Silla called Dokdo as Usando after king Isabu had conquered Usanguk Moreover in the 1500s, Joseon's fisherman An young Bok visited Japan and returned with a paper that says "Ulleungdo and Dokdo is the territory of Joseon. In 1900s, Dokdo was officially incorporated into Gangwon-do province through the forty-first article of Korea's imperial order. Even some documents from Japan says that Dokdo is the appropriate name and that the territory belongs to South Korea.