Suminoyu Ryokan
御宿 炭乃湯おんじゅく すみ乃ゆ
Hilltop ryokan baths above Shibu Onsen's stone streets
Day Use
YesDay-use bathing is available, but by advance reservation only; the inn doesn't publish set day-use hours.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Bathing Arrangements
A private bath you can reserve for yourself or your group
Site's own complete enumeration of the inn's 5 baths (2 indoor, 2 rotenburo, 1 footbath) lists no private/family bath.
Private onsen bath in guest rooms, for overnight guests only
All 5 baths are shared facilities; no guest room is described with its own onsen bath.
Shared bathing area for all genders
Policies & Services
Welcomes children and families
A restaurant or dining room open to visitors, not only meals for overnight guests
The inn hosts day-trip lunch banquet groups (日帰り昼食宴会, different bath hours apply) and confirms it has a banquet hall (宴会場はありますか？ございます); not a walk-in a la carte restaurant.
Shower, wash stations, soap and shampoo provided
On-site or nearby parking available
Views
MountainsHighlights
Foot BathAbout
Suminoyu is a small, 12-room ryokan built at the highest point in Shibu Onsen's old stone-paved streets. The hot-spring water is kakenagashi (掛け流し), kept flowing fresh rather than recirculated, with a soft touch on the skin that's said to warm you through to the core. Two indoor baths are split by gender, and an open-air bath on the top floor catches the sunset over the northern Shinshu peaks and the Shiga mountains. Just outside the entrance there's a small footbath for soaking tired feet after a walk through town. Guests also receive a stamp card for Shibu Onsen's nine public bathhouses, the old yakuyoke (厄除け) bathhouse-hopping route the town is known for.
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Last updated September 19, 2026