Tamatebako Open-air Onsen

Day Use

Yes

Mon09:30–19:30

Tue09:30–19:30

Wed09:30–19:30

ThuClosed

Fri09:30–19:30

Sat09:30–19:30

Sun09:30–19:30

Closed every Thursday (the following day if Thursday is a public holiday), but open daily through New Year, Golden Week, and Obon.

¥900

Adult 900 yen, child (elementary school age or younger) 450 yen, free under age 3. During special periods (New Year, Golden Week, Obon) the rate rises to 1,500 yen for adults (including a 100 yen bathing tax) and 700 yen for children. Bath towel rental is 300 yen; bringing your own towel is fine.

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathNo

Enclosed indoor bathing area

SaunaNo

Dry heat sauna room

Cold BathYes

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

The two rotenburo (Japanese-style and Western-style) swap between men's and women's use daily by odd/even date; no mixed bathing is offered.

Policies & Services

KidsYes

Welcomes children and families

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

A small on-site cafe/kiosk (drinks, ice cream), confirmed by reviews.

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

伏目ヶ水7号

Fushimegamizu No. 7

Operated by · ヘルシーランド露天風呂（特殊公衆浴場）

塩

Chloride

Color: at the wellhead: colorless and clear; in the lab: pale white, slightly turbid
Taste: strongly salty
Odor: odorless

Sodium Chloride spring

pH 7.3NeutralHot source · 100°CStrong saltHigh silica

Composition fingerprint34.2 g/kg dissolved · Hypertonic

Na⁺77

Ca²⁺15

Cl⁻100

◀ 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 chloride strong-salt spring, exceeding ocean salinity and leaving a thick mineral veil on the skin after the bath. The wellhead runs at 100.4 °C — among Japan's hottest natural sources, cooled before bathing — and the water reads colorless and clear at the source, faintly turbid and off-white in the lab, with a pronounced salty tang and no odor. Neutral pH belies a heavily mineralized brine: total dissolved solids reach 34,240 mg/kg, and an unusually generous 587.6 mg/kg of metasilicic acid layers a thin silica film over the salt, lending the water a smoother finish than the headline chemistry would suggest.

Sampled at wellhead·Analyzed Dec 25, 2024·一般財団法人鹿児島県環境技術協会·Cert no. 鹿児島県第2号

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