Is Tokyo Tap Water Safe To Drink?

Yes! The tap water is safe to drink.

Tap water in Tokyo, Japan is safe to drink and meets strict national and international water quality standards. It undergoes rigorous treatment and monitoring.

Water Sources
Drinking Fountains

Water is sourced mainly from the Tone and Arakawa rivers, then purified using advanced filtration, chlorination, and ozone treatment processes.

Tokyo Waterworks Bureau regularly tests for contaminants, ensuring compliance with Japan's Water Supply Act and WHO guidelines. Residents and visitors can confidently drink tap water.

Last checked: 2025-04-25

Japan is ranked as number 38 globally with a score of 78.7% in the water quality EPI research conducted by Yale University.

Source of Water in Tokyo, Japan

Tokyo's main tap water sources are the Tone and Arakawa rivers, providing abundant fresh water for the metropolitan area.

Additional water is sourced from the Tama River and underground aquifers to supplement supplies during peak demand or droughts.

These sources are carefully managed and treated to ensure consistent, high-quality water delivery to Tokyo residents and businesses.

Tokyo Drinking Fountains

Public drinking fountains in Tokyo are generally safe as they use treated tap water meeting strict safety standards.

However, hygiene of fountains varies; some may require caution, especially regarding mouth contact and maintenance frequency.

Using personal water bottles with refilling stations can be a safer alternative to avoid potential contamination from public fountains.

Drinking Water Map

Here is a map showing all the locations of drinking water spots in Tokyo. You can click on each water drop to open the spot directly in Google Maps for directions.

Nearby Places

About the Author

Hi, I'm Emily Hartman, a researcher and water quality specialist with a background in public health.

I've spent the last few years studying how everyday water systems impact our health, and I'm passionate about making that information clear and useful for everyone.

Safe, clean tap water isn't just my job — it's something I truly care about.

Disclaimer

* The information provided on this website regarding the safety of tap water in Tokyo is sourced from reputable sources such as the World Health Organization (WHO), local water authorities, and the Environmental Performance Index (EPI) from Yale University. While we strive to ensure accuracy and reliability, it's important to note that water quality can vary over time and may be subject to factors beyond our control. Users are encouraged to verify the current water quality status with local authorities or consult additional resources before making decisions regarding water consumption. We disclaim any liability for actions taken based on the information provided on this website.