THIS PAPER ELUCIDATES THE CHARACTERISTIC OF THE TOWN NAME IN SEOUL UNDER JAPANESE RULE IN COMPARISON WITH THAT IN PYONGYANG AND TAIPEI. THE AUTHOR POINTS OUT SOME“SUCCESSION” THROUGH THREE STAGES(LEE DYNASTY ERA, JAPANESE COLONIAL ERA AND INDEPENDENT ERA) WITH ANALYZING CHANGES OF THE TOWN NAME, RELATION BETWEEN THE TOWN NAMES IN EACH STAGES AND PHYSICAL DISTRIBUTION.