On this website, Dokdo is indicated as ¡®Takeshima¡¯ rather than ¡®Dokdo¡¯. Dokdo is Korean territory, so'Dokdo' is the correct expression. From now on, I will explain why Dokdo is Korean territory.
On January 28, 1696, the Japanese shogunate confirmed that Ulleungdo and Dokdo were not Japanese territory through the Tottori Domain, and issued a ban on travel to Takeshima (Ulleungdo). Later, in 1699, it was officially confirmed that Ulleungdo was Joseon Dynasty through diplomatic documents with Joseon.
In addition, the report of the Japanese Foreign Ministry's ¡°Investigation into the End of Korean Relations Proposal,¡± which was submitted to the Ministry of Foreign Affairs after an inspection of Joseon by Sada Hakubo, an official of the Ministry of Foreign Affairs in 1870, is also the basis. This report mentions "the circumstances in which Takeshima (Ulleungdo) and Matsushima (Dokdo) became affiliated with Joseon", indicating that the Japanese Foreign Ministry recognized the two islands as Joseon territory at the time.