Yumotosanso Yunokuchi Hot Spring

Day Use

Yes

09:00–21:00

Last entry is 20:15, even though the baths stay open until 21:00. The private kashikiri bath takes reservations up to 19:00.

¥600

The kashikiri private bath (60 minutes, book ahead) costs extra on top of the admission fee: 1,500 yen on weekdays, 2,000 yen on weekends, holidays and the day before a holiday, and 2,500 yen in peak season.

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Bathing Arrangements

Private BathYes

A private bath you can reserve for yourself or your group

60-minute reservable private bath, priced separately from admission (weekday/weekend/peak tiers).

Mixed BathingNo

Shared bathing area for all genders

Men's and women's baths are run and maintained separately; no mixed bathing is mentioned anywhere.

Policies & Services

TattooYes

Allows entry with visible tattoos

Unverified

KidsYes

Welcomes children and families

DiningNo

A restaurant or dining room open to visitors, not only meals for overnight guests

No dining facility on site; meals are at the sister hotel Seiryuso's restaurant, 3 km away. Snacks and drinks (soft-serve, vending) are sold, but there is no restaurant.

WashingYes

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

Two lots: an unpaved one beside the bath building and a paved one near the entrance.

Water treatment

Pure source water· 源泉かけ流し (gensen kakenagashi)

from Article 18 disclosure

Added water
No
Reheated
No
Recirculated
No
Disinfected
No
Bath additives
No

湯ノ口温泉

Yunokuchi Onsen

Operated by · 熊野市

塩

Chloride

Color: faintly yellow-brown
Taste: slightly salty
Odor: faint mineral note

Sodium-Calcium Chloride spring

Hot source · 44°CHigh silica

Composition fingerprint1.4 g/kg dissolved · Hypotonic

Na⁺55

Ca²⁺41

Cl⁻90

◀ 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 sodium-calcium chloride spring served at 44.3 °C — among the hotter natural sources in the region. Weakly alkaline and soft on the skin, with 62.7 mg/kg of metasilicic acid leaving a faint silica film. The water carries a light yellow-brown tint at the source, a salty tang on the lips and a mild mineral note. Delivered straight to the tubs as untreated source flow — no dilution, heating, recirculation or disinfection.

Sampled at wellhead·Analyzed Sep 11, 2008·三重県保健環境研究所

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