 The division blockaded the port and bombarded German defenses during the Siege of Tsingtao in August–November 1914.In 1915 "Iwami" was a guardship at Kure, but she did participate in that year's naval maneuvers and subsequent fleet review.She was assigned to the 5th Division of the 3rd Fleet on 7 January 1918 as its flagship and landed a company of marines in Vladivostok five days later at the start of the Japanese intervention in Siberia during the Russian Civil War.