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https://hanzama.x0.to/2020/05/29/what-is-today-the-day-when-the-public-wireless-lan-00000japan-was-announced-in-the-event-of-a-disaster-it-was-announced-on-the-day-ketaywatch/
【今日は何の日?】災害時に備えて知っておきたい公衆無線LAN「00000JAPAN」が発表された日(ケータイ Watch)