Drinking Water Safety

Is it safe to drink tap water in Tokyo? Yes

Water Drinkable Score: 95/100

Tokyo's tap water is sourced primarily from the Tone and Arakawa rivers, which are renowned for their cleanliness. The Metropolitan Government's Bureau of Waterworks oversees the entire process, ensuring that the water is treated and maintained to high safety standards. In recent years, there have been significant upgrades to the treatment facilities, which now incorporate advanced filtration and mineral enrichment processes to ensure the highest water quality. The water contains healthy amounts of minerals, such as calcium and magnesium, contributing to its taste and safety.

Sources

https://www.waterworks.metro.tokyo.lg.jp/eng/index.html

https://www.japan.travel/en/uk/inspiration/listicles/japanese-tap-water/