evidence: Japan claims it acquired Dokdo/Takeshima as terra nullius in 1905. South Korea argues the feature had been incorporated into the Ullungdo County in 1900, and that Japan's occupation constituted an illegal usurpation. As South Korea was officially annexed by Japan in 1910, Japan's Dokdo/Takeshima claim has been viewed in South Korea as a forerunner to formal Japanese imperialism. [...] For South Koreans, Dokdo/Takeshima is a potent symbol of Japanese colonialism. South Koreans have written songs about Dokdo (see here, here and here) and conducted Dokdo K-Pop flashdances (here). As sources in the construction of national identity, museums and schools also promote Korean ownership of Dokdo. [...] Various Japanese defence white papers have declared Dokdo/Takeshima as 'inherent Japanese territory'. The administration of Prime Minster Shinzo Abe has come under fire in South Korea for sending high-ranking officials to the controversial Takeshima Day started in 2005 in the Shimane Prefecture, which claims the features.