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Hotel Yunomoto

湯の山温泉 ホテル湯の本ゆのやまおんせん ホテルゆのほん

Lodging
Kansai·Mie

Day Use

Yes
11:30–16:00
¥1,000

private baths for ¥2750

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Capabilities

Private BathYes

Private bath available for day-use visitors or hotel guests to reserve

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

湯ノ山温泉宏説湯

Yunoyama Onsen Kosetsu-yu

Operated by · 有限会社ホテル湯の本

Radon
Color
almost colorless and transparent
Taste
tasteless
Odor
odorless

Sodium Bicarbonate-Fluoride spring

pH 8.2Weakly alkalineHigh radon
Composition fingerprint0.2 g/kg dissolved · Hypotonic
Na⁺91
HCO₃⁻60
F⁻22
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Bicarbonate HCO₃⁻
"soda" — softens skin, leaves it smooth.
Known good for
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin
  • Recoveryfatigue, stress

A simple weak-radioactive spring of the radon-bearing "hormesis" tradition, carrying a notable 159.1 Bq/kg of radon. Mineralization is light at just 0.17 g/kg, and the water is mildly alkaline and soft on the skin. Almost colorless, transparent, tasteless and odorless, it is a gentle, low-mineral water whose defining feature is its radon content.

Sampled at wellhead·Analyzed Jul 31, 2023·一般財団法人三重県環境保全事業団 科学分析部第二分析課·Cert no. 第18-C2302390-001号

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3.0

1 review

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Sergey M
1 year ago· edited

434. Hotel Yunomoto, Yunoyama Onsen ★ We visited for a higaeri visit (listed as 11:30 to 16:00, ¥1000). It is close to the ropeway. There are private baths for ¥2750, but we did not use them. At the time of our visit, it was included in the Yunoyama stamp-rally, January to March 2025. On the 5th floor, there is an outdoor bath with a view through a human-height fence, the water is clear, and the temperature is 42. On the 2nd floor, there is an indoor bath, the water is clear, and the temperature is 40-41. It is comfortable to breathe inside. A pleasant place, worth stopping by when visiting Yunoyama. 17.01.2025

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Last updated July 15, 2026