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Myoken Ishiharaso

妙見石原荘みょうけんいしはらそう

Lodging
Kyushu & Okinawa·Kagoshima

Day Use

Yes
11:30–15:00
¥1,800

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

Mixed BathingYes

Shared bathing area for all genders

For overnight guests only; a bathing garment (yuami-gi, 湯浴み着) or swimsuit is required.

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

妙見1号

Myoken Spring No. 1

Operated by · 妙見石原荘 椋の木野天風呂(旅館)

Bicarbonate
Color
colorless and transparent
Taste
metallic and astringent
Odor
odorless

Sodium-Calcium-Magnesium Bicarbonate spring

pH 6.9NeutralHot source · 54°CHigh silica
Composition fingerprint2.3 g/kg dissolved · Hypotonic
Na⁺37
Ca²⁺29
Mg²⁺28
HCO₃⁻74
Cl⁻17
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
  • Recoveryfatigue, stress

Myoken Spring No. 1 is a bicarbonate water led by sodium, with calcium and magnesium close behind — the soft, jusou-sen side of Japanese hot-spring chemistry. It runs neutral and hypotonic: colorless and clear at the wellhead, though it leaves a faint metallic, astringent trace on the tongue and turns slightly brown and hazy by the time it reaches the lab bench. A generous 237.5 mg/kg of metasilicic acid puts it squarely in Japan's beauty-water family, and the posted certificate lists the water for cuts, peripheral circulation disorders, cold sensitivity and dry skin.

Sampled at wellhead·Analyzed May 9, 2018·株式会社東洋環境分析センター

Explore the water

Views

Forest
River

Programs

About

A highly regarded inn along the Amaguri River in the Kirishima volcanic zone, with seven on-site springs feeding the baths directly, no stored water, no added heat. The water is a bicarbonate spring rich in metasilicic acid, known for leaving skin noticeably soft. The mixed outdoor bath (guests only, evening and early morning) sits right next to the river, and private riverside baths can be booked separately. The food, locally sourced and carefully cooked, matches the baths in ambition.

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4.0

1 review

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Shirokuma
3 months ago· edited

Myoken Ishiharaso 妙見石原荘 As an unexpected fellow traveler told me, this luxury onsen has been considered luxury for a long time. Inside, everything is pleasant and smells of wood and oils. It seems all rooms have their own rotenburo (outdoor bath) inside. Also, thanks to the fellow traveler, I learned about the possibility to order kashikiri (private use) if you order lunch during the higawari (day-use) slot. There are 3 rotenburo, but I was able to visit only 1, and what a favorite view it was—a rotenburo located away from the building right next to a mountain river. During the higawari slot, it is not kashikiri, but outside the slot, it is kashikiri. There are towel racks nearby, so you can use it without bringing your own. The indoor baths are also pleasant with luxury-level amenities. There is lemon water and all-you-can-drink coffee. The cost for the higawari slot is 1700 yen. It is part of Kyushu 88 and Kirishima Yutabi.

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Sergey M
1 year ago· edited

361. Myoken Ishiharaso, Kirishima, Kagoshima ★★ I went for the day-use bath for ¥1,800, and in practice it includes unlimited towels. The day-use bath is listed from 11:30 to 15:00, with last entry at 13:30. They stamp the Kyushu 88 Onsen stamp rally. There are private baths, but only for overnight guests. 1. The outdoor bath is a great one, with a view of the river, a house on the other bank, and the forest. From 11:00 to 15:00, basically during the day-use bath period, it is for men, but for overnight guests it is mixed bathing the rest of the time. The water is clear, bluish-white, and slightly cloudy. Temperature: 41. 2. The indoor bath has a very intense design. It reminded me of Prometheus and Alien: Covenant. It looks really impressive. The air inside is comfortable to breathe. The water is clear, bluish-white, and slightly cloudy. Temperature: 40. A very good place, highly recommended at least for the day-use bath. I would not mind staying here too, everything looks very interesting. 08.01.2025

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Last updated September 18, 2026