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Shirahone Onsen, Matsumoto, Nagano — alone in a mountain valley on the way to Kamikochi

Awanoyu

白骨温泉 泡の湯

4.5/5Consenso de huéspedes japonesesElaborado a partir de 12 blogs y crónicas de estancia de huéspedes japonesesFuentes revisadas el 14 oct 2026

Awanoyu in its valley, Shirahone Onsen · YOSHIFUMI OGISO / CC BY-SA 3.0

Consenso de huéspedes japoneses

A huge milky-blue mixed bath you can soak in for an hour — lukewarm by design, with bathing wraps for women — at a century-old mountain inn that's no longer for families

Awanoyu has been in Shirahone since 1912, and nearly everyone comes for one thing: a 70-tsubo outdoor bath of milky, sulphurous water at body temperature (the spring emerges at 37°C), which is why guests happily stay in for an hour or more. It's mixed, but designed to be approachable: separate entrances, a women's changing room with steps straight into the opaque water, and a thick towel-style wrap lent free to overnight guests. Japanese reviewers rate it highly — 4.7 across 835 reviews on one site and 4.63 across 1,260 on another — with the bath and the attentive staff scoring highest; many 2026 reviewers mention small touches such as home-made sweets and a late-night rice ball left in the room. Indoors, a cypress bathhouse has a 37°C tub and a hotter one. Dinner is a 14-dish Shinano course with a Japanese black beef or pork main, and breakfast brings onsen-kayu, rice porridge simmered in spring water. The downsides are the ageing building and its comforts: rooms, halls and dining areas that can be cold in winter, cramped semi-private dining rooms where voices carry, food that never changes, pricey drinks, one hairdryer in the changing room, and horseflies in August. One December 2025 reviewer reported men loitering near the women's entrance to the mixed bath and felt the front desk brushed it off. Since September 2024 children aged 12 and under are not accepted.

Puntuación global4.5/5
Cocina
4.2
Privacidad del onsen
3.4
Tranquilidad
4.3
Hospitalidad
4.1

Últimas novedades

Lo que han añadido las crónicas de estancia, publicaciones y avisos oficiales japoneses más recientes desde que se escribió esta reseña

Guía para elegir habitación

Recomendadas

  • New-building Moegi (萌黄) rooms

    The most common room type: 10 tatami plus a sunroom, kotatsu, and your own bath and toilet. Guests chose it over the main building for the in-room toilet; a couple paid ¥33,550 per person with two meals in 2021 for a third-floor room (third-floor guests get extra amenities and a free drinks corner; second floor is about ¥2,000 cheaper).

  • Moegi with beds, for easier access

    One room with beds, nearest the lift, which the inn recommends for older guests. The lift in the new building goes down to the baths.

Mejor evitar

  • Main-building (本館) rooms

    The cheaper option (reviewers paid around ¥21,000–22,000 per person), but toilets, washbasins and baths are shared. Some guests booked in the main building were upgraded for free — don't count on it.

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Consulta precios y disponibilidad en tiempo real de Awanoyu.

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La cocina a fondo

Consenso sobre el desayuno

4.4/5

Onsen-kayu — rice porridge simmered for an hour in the spring water — with a Japanese breakfast; the lounge offers drinks and snacks from 8:00 to 10:00

Soak in the mixed bath in the evening or early morning, when overnight guests often have it almost to themselves; day visitors come from 10:30 to 13:30. The bath closes for cleaning 10:00–10:30 and 14:00–15:00.

Claves de la cena

4.1/5

The Shinano course of 14 dishes in machiya-style private dining rooms, with a choice of Japanese black beef or mochi pork, plus iwana, Shinshu salmon and toji-soba. Most reviewers are satisfied 'in both quality and quantity', but a 2025 couple found the room 'really cramped', one iwana burnt and the other undercooked, and a tiny croquette; others say there are too many courses, the menu never changes, voices carry between rooms and drinks are overpriced.

Onsen y bienestar: la realidad

Tipo de agua

A sulphurous calcium-magnesium-bicarbonate spring, 37.3°C at the source, pH 6.3 and drinkable, flowing at 1,730 litres a minute. The inn says the hotter indoor tub is warmed by heat exchange without adding water; one booking site lists it as heated and diluted.

Privacidad y ambiente

The big outdoor bath is mixed, open overnight, with separate entrances; women enter from their own changing room down about six slippery steps, and the water is milky so you can move about crouching (two 2026 day visitors found it slightly see-through in bright sunshine). Wraps are free for overnight guests only (day visitors pay ¥800 for a towel). Men reach it by a long corridor from the men's indoor bath; women can't go directly from the women's indoor bath. At 37–38°C it's lukewarm — lovely in summer, chilly in winter — and there are no women-only hours. Separate indoor baths (37°C and about 40°C) and small outdoor baths for each sex. No private bath.

Política sobre tatuajes

No policy found on the official or Japanese booking sites — contact the inn. There are no private baths.

Advertencias y matices locales

  1. 01

    Children aged 12 and under are not accepted (from September 2024).

  2. 02

    Getting there: train from Matsumoto to Shin-Shimashima (30 minutes), then about 70 minutes by bus to the 'Awanoyu-mae' stop (the bus runs mid-April to mid-November in 2026). By car it's about an hour from Matsumoto IC.

  3. 03

    Winter driving: the inn warns that two-wheel drive with studless tyres alone is dangerous — carry chains — and guests describe skidding and getting stuck on Route 300.

  4. 04

    Check-in 15:00 (to 18:00), check-out 10:00. An accommodation tax of ¥200 per person per night applies from June 2026.

  5. 05

    Day bathing (¥1,000, 10:30–13:30) can close at short notice — the inn now says boiler-fuel supply is unstable because of tension in the Middle East, so phone on the day.

Antes de tu estancia

Recuerdos de Matsumoto y ayuda práctica para tu viaje.

Qué hacer cerca

Matsumoto: lugares de interés, experiencias y eventos de temporada de Trip Gacha, nuestro sitio hermano.

Fuentes

Los blogs y crónicas de estancia reales en los que se basa este artículo

Aparece en nuestras guías

Comparativas que incluyen este ryokan.

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A category-by-category packing list for a snowy onsen ryokan trip in Japan from December to March: kairo heat packs (and what the maker and air-safety authorities say about flying with them), snow boots and slip-on ice grips, thermal layers, gloves and hats, lip and skin care for dry air, and a waterproof bag for walking between baths — with what to buy on Amazon.co.jp or Rakuten and what some inns lend.

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Forgot your towel or brought a swimsuit to an onsen in Japan? What to do

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Créditos de las fotos: Utsukushigahara plateau, above Matsumoto · MitsunoriEgawa / CC BY 4.0 / Hiiragiya — the frontage on Anekoji-dori, Kyoto · Mariemon / CC BY 3.0 / Hirugami Onsen, Achi, Nagano · Opqr / CC BY-SA 3.0 / Hoshi Onsen Chojukan — the entrance in snow · veroyama / CC BY 2.0