Is Osaka Tap Water Safe To Drink?

Yes! The tap water is safe to drink.

Yes, tap water in Osaka is safe to drink. Osaka’s water supply is treated and regularly tested to meet Japan’s strict national drinking water standards.

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Water Sources
Drinking Fountains

Most residents can drink it directly from the tap without filtration. Older buildings may have aging plumbing or storage tanks, which can affect taste or quality, so let the tap run briefly if the water has been unused for a long time.

Last checked: 2026-08-31

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 Osaka, Japan

Osaka City’s tap water comes primarily from the Yodo River. The river system includes Lake Biwa and its tributaries, which supply water to the region.

Osaka’s water treatment plants, including the Kunijima and Toyono plants, remove sediment, microorganisms, and other impurities before distribution. Treated water is then delivered through the city’s water supply network to homes and businesses.

Osaka Drinking Fountains

Public drinking fountains in Osaka are generally safe to use because Japan’s municipal tap water is treated and regulated under strict national drinking water standards. Water supplied through maintained public fountains is typically suitable for drinking.

Avoid fountains marked as non-potable or those that appear damaged, dirty, or unused for a long period. Let the water run briefly before drinking, especially in warm weather.

Drinking Water Map

Here is a map showing all the locations of drinking water spots in Osaka. You can click on each water drop to open the spot directly in Google Maps for directions. For easy access on the go, download our iOS app to find water fountains nearby.

Nearby Places

Kyoto (43 km)

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 Osaka 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.