Public Bath No.4 Take-no-yu

Day Use

Yes

06:00–22:00

Available with a key when staying at the ryokan

¥0

when staying at the ryokan and if you have the key

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathNo

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaNo

Sauna room of any kind

Cold BathNo

Cold water plunge bath, typically used after sauna

Bathing Arrangements

Private BathNo

A private bath you can reserve for yourself or your group

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

WashingNo

Shower, wash stations, soap and shampoo provided

横湯第一ボーリング、横湯第二ボーリング、熱の湯の混合泉

Yokoyu No.1 Boring, Yokoyu No.2 Boring & Netsu-no-yu Mixed Spring

Mixed source

塩

Chloride

+ Sulfate

Color: almost colorless and transparent
Taste: slightly salty with a faint sulfur note
Odor: not recorded

Sodium-Calcium Chloride-Sulfate spring

pH 8.0Weakly alkalineHot source · 87°CHigh silica

Composition fingerprint1.6 g/kg dissolved · Hypotonic

Na⁺69

Ca²⁺26

Cl⁻60

SO₄²⁻36

◀ 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
Circulationtired legs
Aches & jointsstiff shoulders

A sodium-calcium chloride-sulfate spring blended from three Yokoyu wells. Weakly alkaline and soft on the skin, the water is almost colorless and transparent yet carries a faint salty, sulfurous edge. The source emerges scaldingly hot at 86.5 °C, among Japan's hottest, and its 199 mg/kg of metasilicic acid leaves a thin silica film for noticeably smoother skin.

Sampled at bath inlet·Analyzed May 26, 2016·一般社団法人上田薬剤師会検査センター·Cert no. No.427

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