The Battle of Tsushima, also known in Japan as the Battle of the Sea of Japan, was the final naval battle of the Russo-Japanese War, fought on 27–28 May 1905 in the Tsushima Strait. A devastating defeat for the Imperial Russian Navy, the battle was the only decisive engagement ever fought between modern steel battleship fleets and the first in which wireless telegraphy (radio) played a critically important role. The battle was described by Sir George Clarke as "by far the greatest and the most important naval event since Trafalgar".
Itsukushima (厳島) was the lead ship in the Matsushima class of protected cruisers of the Imperial Japanese Navy. Like her sister ships, the name Itsukushima comes from one of the traditional Three Views of Japan, in this case, the Itsukushima Shrine in Hiroshima prefecture on the Seto Inland Sea, home to a famous Shinto shrine dedicated to the goddess Benzaiten.
Tokiwa (常盤) was the second and last Asama-class armored cruiser built for the Imperial Japanese Navy (IJN) in the late 1890s. As Japan lacked the industrial capacity to build such warships herself, the ship was built in Britain. She played minor roles in the Boxer Rebellion of 1900 and World War I, but was very active during the Russo-Japanese War of 1904–05 where she participated in the Battle of Port Arthur, the Battle off Ulsan, and the Battle of Tsushima. After the war she was sometimes used as a training ship for naval cadets.
Izumo was the lead ship of her class of armored cruisers built for the Imperial Japanese Navy (IJN) in the late 1890s. As Japan lacked the industrial capacity to build such warships itself, the ship was built in Britain. She often served as a flagship and participated in most of the naval battles of the Russo-Japanese War of 1904–1905. The ship was lightly damaged during the Battle off Ulsan and the Battle of Tsushima. Izumo was ordered to protect Japanese citizens and interests in 1913 during the Mexican Revolution and was still there when World War I began in 1914.
Iwate (磐手) was the second and last Izumo-class armored cruiser built for the Imperial Japanese Navy (IJN) in the late 1890s. As Japan lacked the industrial capacity to build such warships herself, the ship was built in Britain. She participated in most of the naval battles of the Russo-Japanese War of 1904–1905. The ship was moderately damaged during the Battle of Port Arthur, the Battle off Ulsan, and the Battle of Tsushima. Iwate played a minor role in World War I and began the first of her many training cruises for naval cadets in 1916, a task that would last until the end of 1939. The ship continued to conduct training in home waters throughout the Pacific War. Iwate was sunk by American carrier aircraft during the attack on Kure in July 1945. Her wreck was refloated and scrapped in 1946–1947.
Rurik was an armoured cruiser built for the Imperial Russian Navy in the early 1890s. She was named in honour of Rurik, the semi-legendary founder of ancient Russia. She was sunk at the Battle of Ulsan in the Russo-Japanese War of 1904–05.
Askold was a protected cruiser built for the Imperial Russian Navy. She was named after the legendary Varangian Askold. Her thin, narrow hull and maximum speed of 23.8 knots (44.1 km/h) were considered impressive for the time.
Zhemchug was the second of the two-vessel Izumrud class of protected cruisers built for the Imperial Russian Navy. She was sunk during World War I by the German light cruiser Emden in the Battle of Penang in 1914.
Kasagi (笠置) was the lead ship in the Kasagi-class protected cruisers in the Imperial Japanese Navy. The vessel was the sister ship to the Chitose. She was named after Mount Kasagi, a holy mountain outside Kyoto.
Chitose (千歳) was a Kasagi-class protected cruiser of the Imperial Japanese Navy. It was the sister ship to Kasagi.
Rossia was an armored cruiser of the Imperial Russian Navy built in the 1890s. She was designed as a long-range commerce raider and served as such during the Russo-Japanese War of 1904–05. She was based in Vladivostok when the war broke out and made a number of sorties in search of Japanese shipping in the early months of the war without much success.
Gromoboi was an armoured cruiser built for the Imperial Russian Navy in the late 1890s. She was designed as a long-range commerce raider and served as such during the Russo-Japanese War of 1904–05. When the war broke out, she was based in Vladivostok and made several sorties in search of Japanese shipping in the conflict's early months without much success.
Suma (須磨) was a protected cruiser of the Imperial Japanese Navy, designed and built by the Yokosuka Naval Arsenal in Japan. She was the lead ship in the Suma-class cruiser, and her sister ship was Akashi. The name Suma comes from a geographic location near Kobe, in Hyōgo Prefecture.
Peresvet was the lead ship of the three Peresvet-class pre-dreadnought battleships built for the Imperial Russian Navy at the end of the nineteenth century. The ship was transferred to the Pacific Squadron upon completion and based at Port Arthur from 1903. During the Russo-Japanese War of 1904–1905, she participated in the Battle of Port Arthur and was seriously damaged during the Battle of the Yellow Sea and again in the siege of Port Arthur. The ship was scuttled before the Russians surrendered, then salvaged by the Japanese and placed into service with the name Sagami (相模).
Novík was a protected cruiser in the Imperial Russian Navy, built by Schichau shipyards in Elbing near Danzig, Germany.
The Bayan was the name ship of the four Bayan-class armoured cruisers built for the Imperial Russian Navy in the first decade of the 20th century. The ship had to be built in France because there was no available capacity in Russia. Bayan was assigned to the First Pacific Squadron after completion and based at Port Arthur from the end of 1903. She suffered minor damage during the Battle of Port Arthur at the beginning of the Russo-Japanese War of 1904–05 and supported destroyers as they patrolled outside the harbour. After bombarding Japanese positions in July 1904, the ship struck a mine and was out of action for the next several months. Bayan was sunk during the Siege of Port Arthur and was then salvaged by the Japanese after the war.
Borodino was the lead ship of her class of five pre-dreadnought battleships built for the Imperial Russian Navy in the first decade of the twentieth century. Completed after the beginning of the Russo-Japanese War in 1904, Borodino was assigned to the Second Pacific Squadron that was sent to the Far East a few months after her completion to break the Japanese blockade of Port Arthur. The Japanese captured the port while the squadron was in transit and their destination was changed to Vladivostok. The ship was sunk during the Battle of Tsushima in May 1905 due to explosions set off by a Japanese shell hitting a magazine. There was only a single survivor from her crew of 855 officers and enlisted men.
Vladimir Monomakh was an armoured cruiser built for the Imperial Russian Navy during the 1880s. The vessel was named after Vladimir II Monomakh, Grand Prince of Kiev. She spent most of her career in the Far East, although the ship was in the Baltic Sea when the Russo-Japanese War began in 1904. Vladimir Monomakh was assigned to the Third Pacific Squadron and participated in the Battle of Tsushima in May 1905. She was tasked to protect the Russian transports and was not heavily engaged during the daylight portion of the battle. The ship was torpedoed during the night and was scuttled the following morning by her captain to prevent her capture by the Japanese.
Izumrud was a protected cruiser of the Imperial Russian Navy, and the lead ship in the two-ship Izumrud class. Izumrud and her sister ship Zhemchug were based on the German-built Novik.
The Battle of Korsakov, a naval engagement of the Russo-Japanese War, was fought on 20 August 1904 off the southern coast of Sakhalin island. The battle foiled an attempt by the Imperial Russian Navy protected cruiser Novik at escaping Port Arthur to join the Russian cruiser squadron at Vladivostok, Russia, after the Russian Pacific Squadron was scattered in the Battle of the Yellow Sea.
Imperial Russian Navy 
