八峰の湯 Yahho no yu — higaeri in Koumi. Water is neutral, yellowish with brown sediment. Calcium, magnesium, sodium + tansan. Women's side has two indoor baths: 39.5°C and 42.5°C. Nice mountain view from the indoor baths. There's a sauna and 2 cold baths. The outdoor bath has a view of a fence, but if you move to the chair beside the bath you can see the mountains. They claim 100% gensen. The outdoor and hot baths have a slight chlorine smell. For 500 yen you can access the ganbanyoku: it's nice there, not too hot, and smells of wood. A pleasant feeling of warming up to the bone. There's a shop, restaurant, and massage chairs. P.S. Bought birch sap (from Russian birch trees, mind you), but it turned out to be sweet.
Day Use
Yes10:00–21:00
Last entry is at 20:00, an hour before closing. The bathhouse also closes for maintenance on select dates in odd-numbered months: for 2026 into 2027 that's May 13 and 14, July 1 and 2, September 2 and 3, November 4 and 5, January 13 and 14 2027, and March 3 and 4 2027 (call ahead to confirm).
¥700
Adults 700 yen (600 yen on weekdays, except during Golden Week, Obon, and New Year); children (age 4 through elementary school) 300 yen (200 yen on weekdays); ganbanyoku is an extra 500 yen, including a ganbanyoku robe and towel. Residents of the Minamisaku district get a further discount with ID.
Bathing & Water
Natural onsen water
Uses natural hot spring water
Outdoor BathYes
Open-air outdoor bath
Indoor BathYes
Enclosed indoor bathing area
SaunaYes
Dry heat sauna room
Cold BathYes
Cold water plunge bath, typically used after sauna
Capabilities
Private BathYes
Private bath available for day-use visitors or hotel guests to reserve
The private bath ('思いやり浴室') is reservation-only and intended for guests needing nursing care or unable to bathe alone, not a general-purpose family bath.
Mixed BathingNo
Shared bathing area for all genders
Policies & Services
TattooNo
Allows entry with visible tattoos
KidsWith Conditions
Welcomes children and families
Children age 4–elementary school pay the child rate, but unaccompanied small children are refused, and elementary-school-age and younger cannot use the sauna or ganbanyoku.
DiningYes
Restaurant or dining open to visitors (not just hotel meal plans)
WashingYes
Shower, wash stations, soap and shampoo provided
TowelsYes
Towels available to rent or borrow
Rest AreaYes
Relaxation space for after bathing
ParkingYes
On-site or nearby parking available
Views
MountainsHighlights
GanbanyokuAbout
Yahho Hot Springs sits near the top of the Matsubarako hot-spring area, on the highlands below Kitayatsugatake. The indoor baths are kept flowing fresh from the spring, with a cooler tub and a hotter one to move between (alternating is said to help wake up circulation), and the outdoor bath opens onto a wide view of the Yatsugatake range, including a reclining tub built for lying back in. The water is soft and silky on the skin, the kind of bath known locally for leaving skin smooth. Bathing is split into two separate wings, Tengu-no-yu (天狗の湯) and Shirakoma-no-yu (白駒の湯), each with its own indoor and outdoor bath. The infrared sauna runs regular loyly sessions, and the ganbanyoku (岩盤浴) room has guests lie on granite slabs to sweat gently instead of sitting in heat, an easier option for older visitors or anyone who finds saunas rough. There's also a reservation-only private bath for guests who need help bathing or can't bathe alone, and a restaurant leaning on local Shinshu ingredients.
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Last updated July 17, 2026