Japan: population rate served by wastewater treatment systems

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In the fiscal year 2022, approximately 92.9 percent of the Japanese population was served by wastewater treatment systems, indicating a steady increase since fiscal 2013. Reaching almost 100 percent, Tokyo Prefecture had the highest population share with access to wastewater treatment in that year.

Share of population served by wastewater treatment systems in Japan from fiscal year 2013 to 2022

Characteristic	Population percentage
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Release date

August 2023

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Region

Japan

Survey time period

fiscal year 2013 to 2022; the Japanese fiscal year starts on April 1 of the stated year and ends on March 31 of the following year

Supplementary notes

**In fiscal year 2011, Iwate and Fukushima prefectures were out of the scope of the survey to tabulate because the prefectures were affected by the Great East Japan Earthquake.
***In fiscal year 2012, 2013 and 2014, Fukushima prefecture was out of the scope of the survey to tabulate because the prefecture was affected by the Great East Japan Earthquake.
****In fiscal year 2015, the following cities, towns and villages in Fukushima prefecture couldn't be surveyed because the municipalities were affected by the Great East Japan Earthquake: Soma, Minamisoma, Hirono, Naraha, Tomioka, Kawauchi, Okuma, Futaba, Namie, Katsurao and Iitate.

Figures prior to fiscal year 2021 come from previous reporting.

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