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Muro No Yu

牟婁の湯むろのゆ

Public Bathhouse
Kansai·Wakayama

Day Use

Yes
Mon07:00–11:00, 14:00–21:30
TueClosed
Wed07:00–11:00, 14:00–21:30
Thu07:00–11:00, 14:00–21:30
Fri07:00–11:00, 14:00–21:30
Sat07:00–11:00, 14:00–21:30
Sun07:00–11:00, 14:00–21:30

except Tuesdays

¥420

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

礒崎2号

Isozaki Spring #2

Operated by · 白浜町長 井澗 誠

Chloride
+ 含硫黄
Color
colourless
Taste
moderately salty
Odor
odourless

Sodium Chloride spring

Hot source · 74°CStrong saltHigh silica
Composition fingerprint19.9 g/kg dissolved · Hypertonic
Na⁺79
Mg²⁺16
Cl⁻88
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Warmingcold sensitivity
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin

A high-temperature sulfur-bearing sodium chloride strong-salt spring (74 °C at source) from Wakayama's Shirahama coast. Strongly mineralized at roughly 20 g/kg dissolved solids, it leaves the distinct mineral coating of a 'kyō-en-sen' on the skin. Classified as sulfur-bearing ('sulfur-bearing') thanks to trace H₂S, and carries a fair load of metasilicic acid (79.5 mg/kg) for a softer skin-feel beneath the salt.

Sampled at wellhead·Analyzed Aug 18, 2017·一般社団法人 和歌山県薬剤師会 医薬品・公衆衛生検査センター·Cert no. 第E1708045号

Explore the water

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Sergey M
9 months ago

678. Muro-no-Yu, Shirahama, Wakayama Onsen for 420 (visited on the tegate pass). Operating hours are 07:00-11:00 and 14:00-21:30 (except Tue). Included in the Shirahama tegate (1 sticker for 2 people). Two baths inside. Each bath uses water from a different source. Clear water, temperatures of 42 and 42.5 respectively. 09.11.2025

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Last updated June 30, 2026