An island of Korean territory. Japanese government keep claiming that it belongs to Japan(They call Dokdo Takeshima). But only Koreans have been living and guarding there so far. It's so visible that Japan only claims that Dokdo belongs to them just because they have found out a lot of natural resources buried under the island. Even Japanese maps which are centuries of years old indicate that Dokdo belongs to Korea.
Dokdo is definitely Korea's territory. There's no other way round.