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Myoban Onsen Yunosato Open-air

みょうばん湯の里 大露天岩風呂みょうばんゆのさと だいろてんいわふろ

Public Bathhouse
Kyushu & Okinawa·Oita

Day Use

Yes
10:00–20:00

last admission at 19:00

¥800

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Capabilities

Private BathYes

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

Located separately downstairs, with its own cashier.

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooYes

Allows entry with visible tattoos

WashingNo

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

80 spaces

明礬 湯の里

Myoban Yunosato Spring

Operated by · 株式会社みょうばん湯の里

Acidic
+ 含硫黄泉 · Simple
Color
colorless, slightly turbid
Taste
faintly astringent
Odor
strong hydrogen sulfide

Hydrogen Sulfate spring

pH 2.3AcidicHot source · 64°CUltra-acidicSulfur-richHigh silica
Composition fingerprint0.8 g/kg dissolved · Hypotonic
H⁺60
Al³⁺19
SO₄²⁻91
CationsAnions
Hydrogen H⁺
makes the water acidic — sharp and bactericidal.
Sulfate SO₄²⁻
"gypsum / Glauber's salt" — vessels and wound healing.
Known good for
  • Skin conditionsatopic skin, eczema
  • Circulationtired legs
  • Aches & jointsstiff shoulders
  • Sensitive-skin cautionbroken or dry skin

A strongly acidic, sulfur-bearing spring from the Myoban district of Beppu, certified as an acidic sulfur-containing simple thermal water at pH 2.3 — sharp enough to prickle slightly on the skin. At the source it runs colorless but faintly clouded, carrying an unmistakable rotten-egg note of H₂S and a weakly astringent taste on the lips. Dissolved solids are light at 772 mg/kg, yet metasilicic acid reaches 160.8 mg/kg, leaving the kind of thin silica film that makes skin feel noticeably smoother afterwards.

Sampled at wellhead·Analyzed Mar 13, 2015·大分県衛生環境研究センター·Cert no. 衛環研第265号の12

Explore the water

Views

Forest
Mountains

Programs

About

A large rotenburo with a superb view, located at the highest elevation in Beppu. From the large open-air stone bath on the hill, you can look out over Myoban Bridge, Mount Tsurumi, and Mount Takasaki. The milky-white water overflows abundantly and is said to have various benefits, such as supporting health and improving skin condition. Enjoy the excellent water together with the superb view. Separate baths for men and women, each with an uchiyu.

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1 review

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Sergey M
7 months ago· edited

22. Myoban Onsen Yunosato Open-air, Beppu ★★ A public onsen on the mountain as part of the Yunosato complex, with its own reception and cashier. Price is ¥800. Hours are listed as 10:00 to 20:00 (last entry 19:00). They stamp the Beppu Onsen-do stamp rally book. They also stamp the 88 Kyushu Onsen stamp rally book. If you get a stamp here, you cannot get stamps in the same stamp books at the private baths of the Yunosato complex in the cottages below, and vice versa, these would be duplicates and would not count for the Onsen-do. No showers. The bath photos from the internet are accurate. The outdoor bath is large and made of stone. Standing by the fence, there is a view of the mountains and trees, but once you sit in the bath, the view disappears. The water is cloudy, milky blue or milky gray, and acidic (pH 2.2-2.3). There is a slight smell of proper onsen sulfur. Temperature is 43.5. The indoor bath is in a small room opposite the changing room. The water is the same as in the outdoor bath. Temperature is 43. Breathing is great, the room is well ventilated. A great onsen with great water. Highly recommended to visit, in practice it is a must when visiting Beppu. 28.12.2023 04.01.2026

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Last updated July 30, 2026