98.1 percent of the population in Japan had access to drinkable tap water from water services in fiscal year 2019, following a slow but steady increase in the 2010s. Tap water in Japan is supplied using three systems: waterworks, a small-scale water-supply system, and a private water supply system. The Japanese government strictly regulates tap water under the Water Supply Act enacted in 1957 to supply safe and drinkable water to the citizens.
Share of population with access to drinkable tap water from water services in Japan from fiscal year 1950 to 2019
fiscal year 1950 to 2019; the Japanese fiscal year starts on April 1 of the stated year and ends on March 31 of the following year
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) that occurred in 2011, figures from following areas in Fukushima Prefecture were not included: Futaba, Okuma, Tomioka, Katsurao, Iitate, Hirono, and Naraha.
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MLIT (Japan). (April 1, 2021). Share of population with access to drinkable tap water from water services in Japan from fiscal year 1950 to 2019 [Graph]. In Statista. Retrieved May 17, 2022, from https://www.statista.com/statistics/1136150/japan-drinking-water-penetration-rate/
MLIT (Japan). "Share of population with access to drinkable tap water from water services in Japan from fiscal year 1950 to 2019." Chart. April 1, 2021. Statista. Accessed May 17, 2022. https://www.statista.com/statistics/1136150/japan-drinking-water-penetration-rate/
MLIT (Japan). (2021). Share of population with access to drinkable tap water from water services in Japan from fiscal year 1950 to 2019. Statista. Statista Inc.. Accessed: May 17, 2022. https://www.statista.com/statistics/1136150/japan-drinking-water-penetration-rate/
MLIT (Japan). "Share of Population with Access to Drinkable Tap Water from Water Services in Japan from Fiscal Year 1950 to 2019." Statista, Statista Inc., 1 Apr 2021, https://www.statista.com/statistics/1136150/japan-drinking-water-penetration-rate/
MLIT (Japan), Share of population with access to drinkable tap water from water services in Japan from fiscal year 1950 to 2019 Statista, https://www.statista.com/statistics/1136150/japan-drinking-water-penetration-rate/ (last visited May 17, 2022)
