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Awanoyu

泡の湯あわのゆ

Lodging
Chubu·Nagano

Day Use

Yes
10:30–14:00

The exact weekly days off are published on the official website.

¥1,000

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Bathing Arrangements

Mixed BathingYes

Shared bathing area for all genders

Policies & Services

DiningYes

A restaurant or dining room open to visitors, not only meals for overnight guests

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels to rent or borrow at the desk

新泡の湯源泉

Shin-Awanoyu Spring

Operated by · 泡の湯旅館

Drinkable
黄
Sulfur
+ Bicarbonate · Chloride
Sulfur-rich
Known good for
  • Skin conditionsatopic skin, eczema
  • Circulationtired legs
  • Warmingcold sensitivity
  • Sensitive-skin cautionbroken or dry skin

A sulfur spring of the Shirahone Onsen area — a calcium-magnesium bicarbonate-chloride water of the hydrogen-sulfide type. It carries free H₂S and bisulfide with the characteristic rotten-egg note, the kind of sulfur water famous for turning milky-white once it meets the air. Neutral in pH and moderately mineralized at 1,108 mg/kg dissolved solids, it has noticeable body. The source is also one of the rarer ones approved for drinking, with the certificate listing benefits for gastroduodenal ulcers and high cholesterol.

Analyzed Aug 18, 2015·一般社団法人 長野県薬剤師会·Cert no. 長野県第2号

Explore the water

About

Awanoyu sits in the Shirahone valley of the Japanese Alps, and the water here is what draws people: milky-white and faintly carbonated, rich in calcium and magnesium bicarbonate, with a bottom you cannot see. The big mixed outdoor bath (konyoku rotenburo) is the heart of the place: women enter from a separate changing room, walking in while already submerged, and thick bath towels keep things comfortable. The inn itself dates to 1912, classic wooden construction set in national park forest, and the sulfurous smell hits you before you even step off the bus.

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5.0

2 reviews

from 1 reviewer

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SM
Sergey M
2 years ago

Double meals (dinner and breakfast) at Awanoyu 05.01.2024 06.01.2024

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SM
Sergey M
2 years ago· edited

45. Awanoyu, Nagano ★★★ I stayed overnight. The place is just extremely cool. The area around it is nice too, you can even run into wild monkeys. The food is good as well. If you book a room for two for one person, you can ask for a double kaiseki and they will honestly give it to you. About the baths: 1. In the initial area, the men's side, there are two indoor baths. One has clear water and a temperature below average, the other is a hot milky bath. There is also a small outdoor third milky bath outside, with water temperature below average. 2. The main feature of the ryokan is, of course, the large mixed outdoor bath. It is even mentioned in the Matsumoto Museum. The water is a dense milky color, there is a smell, and the temperature in the mixed bath is easygoing. You can literally stay there for hours, moving around the bath and under the water streams. In the dark, it is just insanely nice to lie in the big bath alone, with snow all around and stars in the black sky, it feels like some kind of fantasy. Since you hang out in the bath for hours, the changing crowd can actually add variety. At one point in the evening, an old lady kicked out an old man and 5 or 6 young Japanese women, and directed their movements around the bath. They give women clothing there. As for men, because of the density of the water color, nothing is visible, and the entrance and exit are also relatively discreet. An absolutely great place. The bath is just incredible. 05.01.2024 06.01.2024

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Last updated October 11, 2026