Question: when did japan go to war with russia
Answer: Russo - Japanese War Clockwise from top : Russian cruiser Pallada under fire at Port Arthur , Russian cavalry at Mukden , Russian cruiser Varyag and gunboat Korietz at Chemulpo Bay , Japanese dead at Port Arthur , Japanese infantry crossing the Yalu River Date 8 February 1904 -- 5 September 1905 ( 1 year , 6 months and 4 weeks ) Location Manchuria , Yellow Sea , Korean Peninsula , Sea of Japan Result Japanese victory ; Treaty of Portsmouth Belligerents Empire of Japan Russian Empire Commanders and leaders Meiji Ōyama Iwao Kodama Gentarō Nogi Maresuke Kuroki Tamemoto Tōgō Heihachirō Nicholas II Aleksey Kuropatkin Yevgeni Alekseyev Zinovy Rozhestvensky Stepan Makarov † Wilgelm Vitgeft † Strength 1,200,000 ( total ) 650,000 ( peak ) 1,365,000 ( total ) 700,000 ( peak ) Casualties a