The average water consumption volume per person in Japan amounted to approximately 262 liters per day in the fiscal year 2020. Figures decreased compared to around 296.8 liters in fiscal year 2010.
The coastal Kanto region represented the region with the highest water consumption, likely because the metropolitan area of Tokyo is densely populated and constitutes one of the main industrial centers on the archipelago.
 Water supply
In Japan, tap water is strictly controlled under the Water Supply Act, which regulates all water supply systems, the construction of water supply facilities, as well as hygienic measures. In recent years, over 98 percent of the Japanese population had access to drinkable tap water. Most of the tap water was supplied using waterworks, while a smaller amount was supplied with small-scale water supply systems as well as private water supply systems.
 Wastewater management and water pollution
In recent years, over 92 percent of Japanese citizens were served by wastewater treatment systems, with sewer lines representing the most widely accessed wastewater treatment facilities.
Water pollution has become an environmental issue worldwide. In Japan, marine pollution is mostly caused by oil and waste, often disposable plastic waste. To counteract water pollution, the Japanese government started to invest in pollution control technologies, domestic wastewater treatment systems, as well as educating the public and businesses about the importance of reducing, and recycling waste.
Average daily consumption volume of water per person in Japan from fiscal year 2011 to 2020
(in liters)
Characteristic
Average daily consumption volume per person in liters
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MLIT (Japan). (November 12, 2023). Average daily consumption volume of water per person in Japan from fiscal year 2011 to 2020 (in liters) [Graph]. In Statista. Retrieved November 03, 2024, from https://www.statista.com/statistics/1193527/japan-average-daily-consumption-volume-domestic-water-per-person/
MLIT (Japan). "Average daily consumption volume of water per person in Japan from fiscal year 2011 to 2020 (in liters)." Chart. November 12, 2023. Statista. Accessed November 03, 2024. https://www.statista.com/statistics/1193527/japan-average-daily-consumption-volume-domestic-water-per-person/
MLIT (Japan). (2023). Average daily consumption volume of water per person in Japan from fiscal year 2011 to 2020 (in liters). Statista. Statista Inc.. Accessed: November 03, 2024. https://www.statista.com/statistics/1193527/japan-average-daily-consumption-volume-domestic-water-per-person/
MLIT (Japan). "Average Daily Consumption Volume of Water per Person in Japan from Fiscal Year 2011 to 2020 (in Liters)." Statista, Statista Inc., 12 Nov 2023, https://www.statista.com/statistics/1193527/japan-average-daily-consumption-volume-domestic-water-per-person/
MLIT (Japan), Average daily consumption volume of water per person in Japan from fiscal year 2011 to 2020 (in liters) Statista, https://www.statista.com/statistics/1193527/japan-average-daily-consumption-volume-domestic-water-per-person/ (last visited November 03, 2024)
Average daily consumption volume of water per person in Japan from fiscal year 2011 to 2020 (in liters) [Graph], MLIT (Japan), November 12, 2023. [Online]. Available: https://www.statista.com/statistics/1193527/japan-average-daily-consumption-volume-domestic-water-per-person/