 "Iwami" returned to Kure on 9 September and was subsequently relieved from her assignment with the 3rd Fleet.The ship was assigned to defend Kamchatka from 24 September 1920 to 30 June 1921 and was based in Vladivostok and Petropavlovsk.She was reclassified as a first-class coast defense ship in September 1921 and was used as a training ship.