Onsen OniOnsen Oni

Yumotokan

湯本館ゆもとかん

Lodging
Yugashima Onsen
Chubu·Shizuoka
0558-85-1028yumotokan-izu.jp

Day Use

Yes
12:00–14:30
¥1,000

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

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

西平泉 湯ヶ島29号

Nishihira Spring, Yugashima No. 29
硫
Sulfate
+ Chloride

Calcium-Sodium Sulfate spring

Hot source · 45°C
Composition fingerprint
Ca²⁺59
Na⁺40
SO₄²⁻90
◀ CationsAnions ▶
Calcium Ca²⁺
settling and calming; can leave a white mineral bloom.
Sulfate SO₄²⁻
"gypsum / Glauber's salt" — vessels and wound healing.
Known good for
  • Aches & jointsstiff shoulders
  • Circulationtired legs
  • Warmingcold sensitivity

A calcium- and sodium-led sulfate–chloride spring emerging at 45.4 °C, weakly alkaline and hypotonic. Sulfate dominates the anion balance (about 90 mval%) with chloride underneath, giving the water a settled, mineral-rich body rather than a salty bite. The posted indications include cuts, peripheral circulation issues, sensitivity to cold and dry skin.

Analyzed Feb 6, 2020·株式会社サイエンス·Cert no. 静岡県第5号

Explore the water

Views

Forest

Programs

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5.0

2 reviews

from 1 reviewer

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SM
Sergey M
1 year ago

510. Yumotokan, Izu (pt.1) ★★★ Stayed overnight. Had double dinner and breakfast, kaiseki served in a separate space, everything was great. Listed among the "secret" Hitou onsens. Higaeri advertised at 800 yen from 12:00 to 14:30. This ryokan was deeply beloved by Kawabata Yasunari, the outstanding Japanese writer and Nobel Prize laureate in literature. The ryokan has a dedicated memorial room with photographs. The staff specifically talks about this and emphasizes it — very respectable. The room is very pleasant with a balcony overlooking the river. Falling asleep to the sound of the river is super cozy. Service is also great, Japanese staff with minimal English. About the onsens: 1. Private outdoor stone bath. Absolutely top-tier. No reservation, first-come-first-served. I got in both in the evening and morning without issues. Maximally natural view of the river and forest, incredibly atmospheric. Clear water, very faint proper sulfurous onsen smell. Temperature 39-40. 09.05.2025 10.05.2025

SM
Sergey M
1 year ago

510. Yumotokan, Izu (pt.2) ★★★ About the onsens: 2. Men's indoor bath. Switches to women's from 20:00 to 22:00. Clear water, temperature 41. Breathing inside is tolerable. 3. Women's indoor bath. Switches to men's from 20:00 to 22:00. Clear water, temperature 42-43. Somewhat stuffy inside. 4. Small private indoor bath. Clear water, stuffy inside. Amazing ryokan, highly recommended for a stay. Absolutely loved it. 09.05.2025 10.05.2025

SM

Last updated July 3, 2026