Ureshino Public Hot Spring (Siebold's Bath)

Day Use

Yes

06:00–22:00

Closed on the third Wednesday of each month (the next day instead if that Wednesday is a public holiday). Last admission is 9:30pm, thirty minutes before closing.

¥450

Adult admission is 450 yen; seniors 70 and up pay 340 yen, elementary-age children pay 220 yen, and preschoolers bathe free with a guardian. A discounted rate applies with a disability certificate. Multi-visit tickets and 3/6/12-month passes are sold. A private kashikiri bath is a separate 2,500 yen for 50 minutes (or five bathhouse tickets), extended to 75 minutes for a bather accompanied by a caregiver, plus a 100 yen bathing tax per adult. Towels are not provided, bring your own. Entry is free every April 1, the bath's opening anniversary (kashikiri isn't available that day).

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathNo

Open-air outdoor bath

No outdoor bath; two indoor tubs only, confirmed by three separate 2026 Google reviews.

Indoor BathYes

Enclosed indoor bathing area

Bathing Arrangements

Private BathYes

A private bath you can reserve for yourself or your group

Private bath (kashikiri) bookable for 50 minutes; 2,500 yen or five bathhouse tickets, extendable to 75 minutes for a bather accompanied by a caregiver.

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooYes

Allows entry with visible tattoos

Unverified

KidsYes

Welcomes children and families

Elementary-age children pay a set fee; preschoolers bathe free with a guardian.

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsNo

Towels to rent or borrow at the desk

No towel rental; bathers bring their own.

Rest AreaYes

Relaxation space for after bathing

Second-floor tatami rest room; free after paying for the bath or kashikiri, otherwise 110 yen (adult) / 60 yen (child) on its own.

ParkingYes

On-site or nearby parking available

Times-operated lot next to the facility; free for the first 90 minutes for patrons, then 100 yen per 30 minutes, capped at 500 yen per 24 hours.

嬉野温泉

Ureshino Onsen

Operated by · 嬉野市

曹

Bicarbonate

+ Chloride

Color: colorless and transparent
Taste: slightly salty
Odor: odorless

Sodium Bicarbonate-Chloride spring

pH 7.7Weakly alkalineHot source · 81°CHigh silica

Composition fingerprint1.8 g/kg dissolved · Hypotonic

Na⁺94

HCO₃⁻66

Cl⁻28

◀ 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

Smooth skindry, rough skin
Aches & jointsstiff shoulders
Warmingcold sensitivity

A weakly alkaline sodium bicarbonate-chloride spring rising at a striking 81 °C — one of Japan's hottest natural sources at this site. The bicarbonate-dominant chemistry, classified as the legacy jūsō-sen (soda-water) style, gives the slippery feel Ureshino is famous for as one of the country's three great beauty-water onsens, while the chloride layer adds heat-retaining body. Metasilicic acid at 135.6 mg/kg leaves a faintly hydrating silica film, and the wellhead reads only mildly salty.

Sampled at wellhead·Analyzed Mar 23, 2023·一般社団法人佐賀県環境科学検査協会·Cert no. 2022-00028-01号

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