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Kokubunji Onsen Tokyo

Kokubunji, Tokyo (Kanto), Japan
Kokubunji Onsen Tokyo
Location
Kokubunji, Tokyo (Kanto), 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

Kokubunji, in the central western part of Tokyo Metropolis on the Chuo Line, is named for the ancient Musashi Kokubunji Temple established by Emperor Shomu in the eighth century as part of his national network of provincial temples, and the city has preserved the archaeological site of this ancient foundation alongside its modern university-town character shaped by eight educational institutions. Kokubunji Onsen Tokyo draws on chloride-rich thermal waters from the geological resources of the central western Tokyo upland, offering warm restorative baths in a university city whose ancient temple heritage, the traditional Kokubunji Hikawa Shrine, and the lively student culture create an engaging and intellectually vibrant spa setting in central western Tokyo. The Musashi Kokubunji Temple archaeological site and museum, the Nomi River natural green corridor cycling path, and the creative and independent café culture of the Kokubunji station area — known for its concentration of traditional coffee shops and independent bookstores — create a pleasantly cultured and historically layered thermal destination in western Tokyo Metropolis.

Insider tip — Kokubunji is a quiet academic city along the Chuo Line bisecting the Musashino Plateau, and its sodium-chloride sento taps saline groundwater typical of deep Kanto alluvial deposits. The warming mineral water draws students and researchers from nearby Hitotsubashi University. Local bathers recommend the jet baths for relieving desk-work fatigue.
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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).