佐世保鎮守府
After the war, "Suma" was re-designated as a 2nd-class coastal defense vessel from 1 September 1921 . "Suma" was demilitarized per the Washington Naval Treaty and re-designated a utility vessel on 4 April 1923 and was removed from the active navy list. She continued to be used as a guard ship at Sasebo Naval District until broken up for scrap in 1928.