旅順港閉塞作戦
"Tsushima" was commissioned during the middle of the Russo-Japanese War, but she was present with the 4th Detachment of the Japanese 2nd Fleet and participated in the shore bombardment of Russian positions during the Battle of Port Arthur on 9 March 1904. From April, she was assigns to patrols of the Korea Strait and the Sea of Japan, but was not in position to participate in Battle off Ulsan on 14 August 1904.