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Ichikawa Onsen Chiba

Ichikawa, Chiba Prefecture, Japan
Ichikawa Onsen Chiba
Location
Ichikawa, Chiba Prefecture, Japan
Water type
sodium chloride
Temperature
41 °C
pH
7.3

Water profile

Thermicity
Sedative
41 °C
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

Ichikawa, in the northwestern Chiba Prefecture directly across the Edogawa River from Tokyo, is the first city encountered crossing from Tokyo into Chiba Prefecture, its suburban character shaped by centuries as the boundary between the old Edo capital and the Shimosa countryside, a position that gave the city its distinctive character as a cultural and commercial transition zone. Ichikawa Onsen Chiba draws on chloride-rich thermal waters from the geological resources of the Chiba plain adjacent to the Edogawa River delta, offering warm restorative baths in a river-border community whose proximity to Tokyo, traditional Gyotoku salt-farming heritage of the bay shore, and access to the Satomi Park cherry blossoms create an appealingly urban-adjacent spa setting. The Ichikawa City Gyotoku salt-farming heritage museum, the Satomi Park cherry blossom avenue and castle ruins, and the easy Sobu Line access to Shinjuku and central Tokyo make Ichikawa a conveniently located urban spa destination at the Chiba-Tokyo metropolitan boundary.

Insider tip — Ichikawa sits on the eastern bank of the Edo River directly opposite Tokyo's Edogawa ward, and its sento tradition stretches back to the Edo period when river workers sought nightly relief here. Deep saline waters at 41°C echo the ancient marine deposits beneath the Kanto Plain, delivering warmth that combats the humid river-valley chill. The baths are compact, lively, and unapologetically local. Cross via the Ichikawa Bridge on foot after your soak for a night view of the Tokyo skyline.
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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 water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).