Shintenchi Tennen Onsen; Honden no Yu
Ichikawa, Chiba, Japan
- Location
- Ichikawa, Chiba, 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.
SodiumChloruresBrome
Shintenchi Tennen Onsen Honden no Yu, in Ichikawa, Chiba Prefecture, taps sodium-chloride thermal water at 41°C. An indoor bath, an outdoor rotenburo and a sauna round out the offer.
Insider tip — Ichikawa borders Tokyo along the Edo River — the historic waterway that defined the eastern boundary of old Edo. The Honden no Yu (Main Hall Spring) taps the characteristically dark artesian black water of the eastern Kanto basin, rich in sodium and chloride from Miocene marine sediments. Ichikawa's Nakayama Hokekyoji temple is one of Japan's most important Nichiren Buddhist sites, and the city's cherry blossom promenade along the Kokubunji-gawa is a local spring institution.
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.