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Outage time in Japan is the shortest in the world because Japanese power utilities have applied distribution automation system (DAS) in the whole area. Toshiba developed and supplied DAS using a computer from 20 years ago and have been supplying DAS in Japan and in overseas countries. Therefor, we introduce DAS for overseas countries based on our long-term experience. Major points are as follows. DAS using only local equipment (vacuum switch (VS)/fault detecting relay (FDR)): (1) comparison between recloser and VS/FDR; and (2) recommendation system combined recloser and VS/FDR. DAS using computer: (1) display of distribution network with mapping system; (2) automatic power supply; and (3) underground DAS using automatic ring main unit. Communication system for DAS: (1) comparison among radio, twisted pair cable and optical fiber; and (2) optical fiber communication system. We also introduce DAS in future with new technology such as TCP/IP network.