Tokyo Tennen Onsen; Kodai no Yu
Kameari, Katsushika, Tokyo, Japan
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- Location
- Kameari, Katsushika, Tokyo, Japan
- Water type
- sodium chloride, thermal
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
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In Kameari, Katsushika Ward, Tokyo, Kodai no Yu draws sodium-chloride thermal water at 41°C. Visitors can use an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Katsushika-ku is the spiritual home of the beloved manga Kochikame (Kamera Koen area) and the atmospheric Shibamata Taishakuten temple — a Showa-era streetscape virtually unchanged since the 1950s. Tokyo Tennen Onsen Kodai no Yu (Ancient Water Spring) taps the natural black water aquifer for which eastern Tokyo is famous — dark, mineral-laden sodium-chloride water from Miocene marine strata 1,500 meters below the city. Authentic Shitamachi Tokyo at its finest.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.