Public Bath No.8 Shinmeidaki-no-yu

Day Use

Yes

06:00–22:00

if you have the key when staying at the ryokan

¥0

if you have a key when staying at the ryokan

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathNo

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaNo

Dry heat sauna room

Cold BathNo

Cold water plunge bath, typically used after sauna

Capabilities

Private BathNo

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

Room OnsenNo

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

WashingNo

Shower, wash stations, soap and shampoo provided

神明滝の湯

Shinmei-taki no Yu

Operated by · 渋大湯組

Mixed source

硫

Sulfate

+ Chloride

Color: almost colorless and clear
Taste: has a metallic iron taste and a faint saltiness
Odor: not recorded

Sodium-Calcium Sulfate-Chloride spring

pH 6.0NeutralHot source · 59°CHigh silica

Composition fingerprint1.2 g/kg dissolved · Hypotonic

Na⁺56

Ca²⁺34

SO₄²⁻51

Cl⁻48

◀ CationsAnions ▶

Sodium Na⁺: salt's cation — pairs with chloride to make the water salty.
Sulfate SO₄²⁻: "gypsum / Glauber's salt" — vessels and wound healing.

Known good for

Aches & jointsstiff shoulders
Circulationtired legs
Warmingcold sensitivity

A hot (58.7 °C) sulfate-chloride spring led by sodium and calcium, neutral in pH and moderately mineralized at 1,218 mg/kg — the kind of water with real body to it. Metasilicic acid runs high at 148.7 mg/kg, leaving the thin silica film that makes skin feel noticeably smoother afterwards. Almost colorless and clear at the bath inlet, with a metallic iron edge and a faint salty note on the lips.

Sampled at bath inlet·Analyzed Nov 24, 2015·一般社団法人上田薬剤師会検査センター·Cert no. 中27-21(No.2051)

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