日本海海戦
During the final decisive Battle of Tsushima, "Chitose", together with the other cruisers in the 3rd Division, she engaged the Russian cruisers , , and . When "Kasagi" was damaged in the battle, Admiral Dewa transferred his flag to "Chitose". The following day, "Chitose" sank a Russian destroyer, and successfully pursued the cruiser . Following the Battle of Tsushima, "Chitose" was assigned to cover the landings of Japanese reinforcements in northern Korea. She was returned to Maizuru Naval Arsenal for repairs at the end of July 1905.