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Yumoto Onsen Hakone Tenzan

Yumoto, Hakone, Kanagawa (Chubu), Japan
Yumoto Onsen Hakone Tenzan
Location
Yumoto, Hakone, Kanagawa (Chubu), Japan
Water type
sulfurous
Temperature
42 °C
pH
6.5

Water profile

Thermicity
Sedative
42 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Bio-active
LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Yumoto Onsen Hakone Tenzan is a popular public bath complex in the Yumoto area of Hakone Town, Kanagawa Prefecture, the most accessible gateway to the Hakone hot spring resort district that is Japan's most visited thermal destination, drawing over 20 million visitors annually to the volcanic landscape surrounding the Hakone caldera where views of Mount Fuji reflected in Lake Ashi, the Hakone Open Air Museum, the Owakudani volcanic steam vents, and the historic Tokaido highway culture combine with abundant sulfate thermal springs to create the most comprehensive and internationally famous onsen resort experience in the Japanese archipelago. The Yumoto area, where the hot spring tradition dates back to the Nara period and the Hakone Checkpoint museum preserves the memory of the great Tokaido road barrier that controlled passage between Edo and the western provinces for 250 years, represents the historical and geographical heart of the Hakone onsen complex where several distinct spring systems of different mineral compositions converge in a compact resort valley. The sulfate-rich thermal waters of Hakone Tenzan's outdoor and indoor bath facilities are particularly prized for their whitish, milky appearance and smooth skin-nurturing quality, offering one of the most satisfying and quintessentially Japanese large-scale public thermal bathing experiences in the country with Mount Fuji visible on clear days from the outdoor pools.

Insider tip — Yumoto is the gateway to Hakone's volcanic thermal complex, positioned where the Hayakawa River cuts through the caldera rim and sulfurous springs bubble at low elevation. The Tenzan facility is large and well-appointed with multiple rotemburo overlooking the forested gorge, remaining open to non-staying guests. The Tozan railway and its brilliant ajisai hydrangea corridor in June make the approach as scenic as the destination itself. Arrive on a weekday evening after Tokyo day-trippers depart to experience the rock baths in near-solitude.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 42 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).