According to international law, Takeshima belongs to Japan 

Territorial signpost is erected anew by Shimane Prefecture and the Japan Coast Guard in June,1953

In 1904, a resident of the Oki Islands, Yozaburo Nakai, requested the government to incorporate Takeshima as a territory and lease it out for the purpose of sea lion hunting.

In response to this, the government officially named the islands Takeshima, by a Cabinet Decision on January 28, 1905, and designated them as belonging to Japan under the jurisdiction of the Oki Islands Branch, Shimane Prefectural Government.

Based on this Cabinet decision, the Governor of Shimane Prefecture announced the details in the Shimane Prefectural Notice NO.40 on February 22 of the same year.

The islands were entered in the State Land Register in the same year, sea lion hunting was approved in accordance with fisheries supervision rules, the Governor inspected the islands, and in the next year, site surveys by officials from Shimane Prefecture were carried out.

 The requirement under international law for acquisition of a territory is effective possession of the land. In addition to the historical title over Takeshima, the aforementioned measures reaffirmed the Japanese title under modern international law.

In accordance with international law, Takeshima clearly belongs to Japan.