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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

Capabilities

Private BathYes

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

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(椿の木野天風呂、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 fingerprint2.8 g/kg dissolved · Hypotonic
Na⁺39
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

A hot (54 °C) sodium-magnesium-calcium bicarbonate spring. The water emerges clear at the wellhead but oxidizes into a faint yellow-brown turbidity on contact with air, leaving a metallic, slightly astringent taste from dissolved iron. Neutral pH and a moderate 2,768 mg/kg mineralization, with an unusually generous 237.5 mg/kg of metasilicic acid that leaves the skin noticeably smoother — the classic silica-film effect.

Sampled at wellhead·Analyzed May 9, 2018·株式会社東洋環境分析センター·Cert no. 鹿児島県第4号

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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GreyChertZ

2 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 August 1, 2026