Nanasawa Sō
七沢荘ななさわそう
Strongly alkaline baths and a sauna at a small ryokan near Tokyo
Day Use
YesIrregular closures; Thursdays and one Wednesday per month are regular days off. Check the operating calendar.
Weekday adult 1,100 yen / child 700 yen; weekend/holiday adult 1,700 yen / child 800 yen; peak season adult 1,900 yen / child 1,000 yen. 2-hour admission. Includes large bath, rotenburo, sauna, foot bath.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Bathing Arrangements
A private bath you can reserve for yourself or your group
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Large baths are generally off-limits for tattoos; allowed if fully covered with tape or by booking the private bath.
Welcomes children and families
Children under 3 cannot use the large baths; 3 and older may use them (with entry fee).
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
On-site or nearby parking available
Views
Mountains
ForestHighlights
Foot BathAbout
Nanasawa-so is a small ryokan near Atsugi with indoor and outdoor baths fed by a natural spring known for its clear, strongly alkaline water that leaves skin silky and slippery. Separate men's and women's baths each include a rotenburo. A compact sauna connects to two tub-style cold plunge baths, both fed on kakenagashi (源泉かけ流し, unrecirculated spring water). A private kashikiri bath also runs on kakenagashi. Outside, a foot bath runs doctor fish in summer and switches to hot spring water for the cooler months.
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Last updated September 19, 2026