File:Japan-military-telegraph.jpg

A Japanese Naval Map of June 1905 (38 th of Meiji period 明治三十八年六月) during Russo-Japanese War showing the locations of telegraph lines between Japan and Korea as of June 1905. The red wavy line from Oki to Korea through Liancourt Rocks (Takeshima, 竹島) and Ulleungdo (Matsushima, 松島) is designated as "Planned" (豫定)the line was instead linked from Liancourt Rocks to Matsue.