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Kanaguya

歴史の宿金具屋れきしのやどかなぐや

Lodging

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

A private bath you can reserve for yourself or your group

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

金具屋第1ボーリング

Kanaguya No. 1 Borehole

Operated by · 有限会社金具屋ホテル

黄
Sulfur
+ Chloride · Sulfate
Color
almost colorless and clear
Taste
sulfurous, slightly salty, slightly bitter
Odor
faint hydrogen sulfide

Sodium-Calcium Chloride-Sulfate spring

pH 8.1Weakly alkalineHot source · 97°CSulfur-richHigh silica
Composition fingerprint1.7 g/kg dissolved · Hypotonic
Na⁺70
Ca²⁺24
Cl⁻63
SO₄²⁻32
◀ CationsAnions ▶
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Skin conditionsatopic skin, eczema
  • Circulationtired legs
  • Aches & jointsstiff shoulders
  • Sensitive-skin cautionbroken or dry skin

A sulfur-bearing sodium-calcium chloride-sulfate spring that rises under its own pressure at 97 °C — among Japan's hottest natural sources, and necessarily cooled before it reaches a bath. At the wellhead the water is almost colorless and clear, yet it carries a frank sulfurous taste over a light saltiness and the unmistakable rotten-egg note of H₂S. Weakly alkaline and soft on the skin, it also runs a generous 219.6 mg/kg of metasilicic acid, putting it squarely in Japan's beauty-water family, while the chloride and sulfate load gives the moderate mineralization a warmth that lingers well after the bath.

Sampled at wellhead·Analyzed Sep 26, 2018·一般社団法人 上田薬剤師会 検査センター·Cert no. 中30-6(No.1429)

Explore the water

Views

City
Mountains

Highlights

Cave Bath
Boat Bath

About

Eight baths, all fed from the inn's own four springs, with the water arriving unheated and undiluted from the spouts and even from the taps. Three are large baths, a men's and women's rotenburo and two indoor baths that swap by gender; the other five are private baths, free and needing no reservation. Among them are Gankutsu-no-yu (岩窟の湯), a cave bath, and Funaburo (舟風呂), a tiled tub genuinely shaped like a boat with Mount Fuji painted at one end. Kamakura-buro (鎌倉風呂), on the ground floor of the old tower, is built after Kamakura-period carpentry and carries white flakes of yunohana (湯の花); Roman-buro (浪漫風呂), the inn's first Western-style bath from 1950, has a fountain and arched stained-glass windows. The building is what people come for. Saigetsuro (斉月楼), a wooden four-storey tower finished in 1936, and the great hall beside it were registered as tangible cultural properties in 2003, and staying guests can join the inn's own walk through them in the early evening.

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5.0

5 reviews

from 1 reviewer

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Sergey M
8 months ago· edited

819. Kanaguya, Shibu Onsen, Nagano (pt.1) ★★★ A ryokan from the fan-made list of onsen that supposedly inspired Miyazaki when depicting the onsen in Spirited Away. What matches: - the front view of the main building strongly resembles the top part of the main building above the entrance in the anime; - the color palette inside and the interior may not look like a specific frame from the anime, but the overall vibe is definitely there. It even feels like walking through the ryokan between the baths and rooms brings up the anime association more than the facade does; - the overall format of a large multi-building property with onsen that you keep moving through. On the map, the ryokan looks like one unified complex, but in fact it consists of four buildings and a banquet hall. And you cannot move between the buildings on every floor. It may seem that this makes getting around a bit more complicated, but in fact it only adds interest to exploring the place. The baths are located in all the buildings, so a full round through them takes you through every building. 16.01.2026 17.01.2026

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Sergey M
8 months ago

Two meals, dinner and breakfast, at Kanaguya 16.01.2026 17.01.2026

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Sergey M
8 months ago

819. Kanaguya, Shibu Onsen, Nagano (pt.3) ★★★ About the onsen: 1. Roten-buro. An open-air bath on the roof of the entrance building. Standing up, you can see the mountains and the village over the fence. Sitting in the water, the view disappears. The water is clear, temperature 42.5. 2. Saigetsu-no-yu. Onsen boat. Private indoor bath. The water is clear, temperature 40.5. It is comfortable to breathe inside. 3. Gankutsu-no-yu. Private cave bath. It really feels like being in a small cave. The water is clear, temperature 43.5. It is comfortable to breathe inside, and there are three small windows facing outside, which can also be opened. 4. Bimyo-no-yu. Private wooden barrel bath. The water is clear, temperature 45. It is comfortable to breathe inside. 16.01.2026 17.01.2026

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Sergey M
8 months ago

819. Kanaguya, Shibu Onsen, Nagano (pt.2) ★★★ I stayed one night in the entrance building. The room had shared heating, and even on Low it was very comfortable and warm in winter. Overall, it was the warmest room on the whole trip in January 2026. The room has a book about ryokan where many cats live, and Kanaguya is listed in it too. And indeed, while walking around the ryokan, you keep running into cats from time to time, and they can climb anywhere as if they own the place. At the ryokan, they give you a key for visiting 9 public onsen in Shibu Onsen. At reception, they sell onsen goshuin. I mainly dealt with Japanese staff. The service was all decent. I had the set meal option, dinner kaiseki and breakfast. Meals were served in a nice large banquet hall. 16.01.2026 17.01.2026

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Sergey M
8 months ago

819. Kanaguya, Shibu Onsen, Nagano (pt.4) ★★★ About the onsen: 5. Kamakura-buro. Alternates between men and women with Roman-buro. Indoor bath. The water is rather clear, slightly cloudy. Temperature 44.5. It is easy to breathe inside, but the room felt cool in winter. There is only one shower. 6. Roman-buro. Alternates between men and women with Kamakura-buro. Indoor bath in a "Roman" style with stained glass. The ceiling of the room looks like something from a horror movie, but that actually works in its favor, the bath feels even more unreal. The water is dark green and cloudy. Temperature 43. Breathing inside is fine. 7. Koyasu-no-yu. Private indoor small bath. The water is clear, temperature 39. Breathing inside is comfortable. 8. Keiwa-no-yu. Private indoor small bath. The water is clear, temperature 45 before stirring the water and 42 after. Breathing inside is comfortable. A top place. A very strong combination of advantages, the "supposedly Miyazaki-like" effect outside and especially inside, lots of baths of different and rare types, several kinds of water, a large ryokan complex, decent service. 16.01.2026 17.01.2026

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Last updated October 6, 2026