Rainwater Usage in Akashima, Japan: Completely Dependent on Rainwater for Domestic Water Supply

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  • Kasai Toshihiro
    Faculty of Environmental and Information Sciences, Fukui University of Technology
  • Kondo Sho
    Faculty of Environmental and Information Sciences, Fukui University of Technology
  • Nomura Rikuu
    Faculty of Environmental and Information Sciences, Fukui University of Technology
  • Omodera Kana
    Faculty of Environmental and Information Sciences, Fukui University of Technology

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  • 全生活用水を雨水に依存する長崎県五島市赤島の雨水利用実態
  • ゼン セイカツ ヨウスイ オ ウスイ ニ イソン スル ナガサキケン ゴトウシ セキトウ ノ アメ ミズリヨウ ジッタイ

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<p>  Akashima island, Goto City, in the Nagasaki Prefecture of Japan is a small island (0.54 km2) with approximately 10 residents. The island is the only island in Japan where all domestic water is supplied by rainwater harvesting. The Fukui University of Technology has been implementing the Akashima Revitalization Project since 2016, aiming at the sustainable development of Akashima. As part of the project, a survey on rainwater usage was conducted in Akashima. The survey results indicated that the quality of the stored rainwater was relatively good, and there were no issues with simple filtration and sterilization. The daily water consumption per person was between 50 to 60 L, approximately a quarter of the water used by people living in a general city with water supply (219 L).</p>

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