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Moriaki Ryokan

伊香保温泉 森秋旅館

Lodging
Kanto·Gunma

Day Use

No

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

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

TowelsYes

Towels available to rent or borrow

総合湯(混合泉)

Sogoyu Blended Spring

Mixed source

Sulfate
+ Bicarbonate · Chloride
Color
colorless and transparent, with a slight amount of brown suspended matter
Taste
not recorded
Odor
not recorded

Calcium-Sodium Sulfate-Bicarbonate-Chloride spring

High silica
Composition fingerprint1.2 g/kg dissolved · Hypotonic
Ca²⁺48
Na⁺30
Mg²⁺18
SO₄²⁻41
HCO₃⁻31
Cl⁻28
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

Sogoyu is a blended supply — the posting names it a mixed spring drawing on more than one source — and it reads as a calcium-sodium sulfate water with bicarbonate and chloride layered behind it. Neutral and hypotonic, it has quiet body from the sulfate, a softness from the bicarbonate and a faint salty edge from the chloride. The water is colorless and clear apart from a few brown flecks of suspended mineral, a trace of its small iron content. At 181 mg/kg, metasilicic acid is generous enough to place it in Japan's beauty-water family, leaving the kind of thin silica film that makes skin feel smoother afterwards.

Analyzed May 30, 2017·群馬県薬剤師会環境衛生試験センター

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3.0

3 reviews

from 1 reviewer

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Sergey M
7 months ago· edited

782. Moriaki Ryokan, Ikaho Onsen, Gunma (pt.1) ★ Stayed overnight. There is a bath rotation between men and women. There are many staff at the hotel, and most of them are Japanese. I ordered the double meal plan (kaiseki dinner and buffet breakfast). It was served in a separate room. The food was pleasant in terms of taste, but there were some issues with the service. Kaiseki was served in a shared tatami hall with many people at small tables, and there were lots of children running around. Through the wall, I could hear that there was at least one more hall where people were hanging out very noisily and actively. A staff member accidentally spilled cold water from the pot used for boiling onto the floor next to one of the empty neighboring tables, wiped the tatami, but a little water remained on the second table and that was ignored. About the onsen: 1. First set of baths in the men/women rotation. 1.1. Outdoor bath. No view. The water was cloudy orange-brown. Temperature 37. 1.2. Indoor bath with cloudy orange-brown water. Temperature 41.5. It was easy to breathe inside. 11.01.2026 12.01.2026

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Sergey M
8 months ago· edited

Double dinner at Moriaki Ryokan 11.01.2026 12.01.2026

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Sergey M
8 months ago· edited

782. Moriaki Ryokan, Ikaho Onsen, Gunma (pt.2) ★ About the onsen: 2. The second set of baths, switched between men and women. 2.1. Outdoor bath. No view. The water was cloudy orange-brown. Temperature was 40.5. 2.2. Indoor bath with cloudy orange-brown water. Temperature was 42. Breathing inside was fine. 3. Large indoor bath, no gender rotation. It turned out to be a very atmospheric bath during the visit. Because of the large amount of dense steam, the color tones, and the architecture, it created a kind of special, mystical effect. The water was cloudy orange-brown. Temperature was 41.5. Breathing inside was fine. There were some issues with dinner service. The baths were pleasant, especially the large atmospheric indoor bath. Overall, solid, worth keeping in mind. 11.01.2026 12.01.2026

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Onsen OniSM@S

Last updated July 30, 2026