Kammala jumla mai zuwa: jirgin yaƙi ne na pre-dreadnought wanda aka gina don Rundunar Sojojin Ruwa na Imperial Japan (IJN) a ƙarshen 1890s. An sa masa suna bayan Dutsen Mikasa a Nara, Japan, jirgin ya zama babban jirgin ruwa na Mataimakin Admiral Tōgō Heihachirō a duk lokacin Yaƙin Russo-Japan na 1904-1905, gami da Yaƙin Port Arthur a rana ta biyu na yaƙin da kuma Yakin Tsakiyar Tsakiya na Tsakiya.
Yaƙe-yaƙe na Yellow Sea da Tsushima. Kwanaki bayan karshen yakin, mujallar "Mikasa" ta fashe ba da gangan ba kuma ta nutse jirgin. An ceto ta kuma gyaranta ya ɗauki fiye da shekaru biyu don kammalawa. Daga baya, jirgin ya yi aiki a matsayin jirgin ruwa na kariya a lokacin yakin duniya na farko kuma ya goyi bayan sojojin Japan a lokacin da ake shiga tsakani a Siberia a cikin yakin basasa na Rasha.