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Share of population with access to drinkable tap water Japan 2019, by prefecture

All the population in Tokyo Prefecture and Osaka Prefecture in Japan had access to drinkable tap water supplied by water services in 2018, while around 88.1 percent of the population in Kumamoto Prefecture was served with tap water from water services. The capital city in the prefecture Kumamoto abounds with water resources and covers all the water supply in the city and surrounding area using groundwater.

Share of population with access to drinkable tap water from water services in Japan in 2019, by prefecture

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Release date

July 2020



Survey time period

2019; as of March 31

Supplementary notes

Tap water penetration rate= total number of population with access to tap water (supplied with waterworks + supplied with a small-scale water-supply system + supplied with a private water supply system) / total number of population

Due to the Great East Japan Earthquake (Tohoku earthquake) occurred in 2011, figures from following areas in Fukushima Prefecture were not included: Futaba, Okuma, Tomioka, Katsurao, Iitate, Hirono, and Naraha.

The source does not provide an exact publication date. The release date given here is the day of data access.

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