Right Onsen › Kanagawa › Atsugi
Nanasawa-sō
4.0★ · 1,813 Google ratings · Atsugi, Kanagawa · 七沢荘
✓ Day visitors✓ Outdoor bath✓ Private bath✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesStated on the facility's website
Hours
Not publishedCheck the official site
Tattoos
Cover requiredStated on the facility's website
Price
¥1,100 adultConfirmed by recent visitor reports
Private bath
✓ AvailableStated on the facility's website
How we know this
- Day visitors: Multiple visitors used the bath as day-use guests between June and September, sometimes needing to queue on busy weekends. · stated on the facility's website, read 2026-09 · 3 visitors, Jun 2026 – Aug 2026
- Tattoos: stated on the facility's website, read 2026-09
- Price: Weekday admission was reported as 1,100 yen, while weekend/holiday prices of 1,300–1,700 yen were also mentioned in other reviews. · 3 visitors, Jun 2026 – Sep 2026
- Private bath: stated on the facility's website, read 2026-09
The bath
What you’ll find
Nanasawa-sō is a renovated ryokan near Nanasawa Onsen offering day-use bathing in a very slippery, high-pH alkaline 'bihada' spring with indoor and outdoor baths, sauna, and cold plunge; admission price and crowding vary by day and time.
Bath setup
Indoor baths
1.0Reported by two visitors
Outdoor bath
✓ YesConfirmed by recent visitor reports
Outdoor baths
1.0Reported by two visitors
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
Private bath
✓ YesStated on the facility's website
Spring water
Source temperature
25°CReported by one visitor
pH
pH 9.78Reported by two visitors
Free-flowing (kakenagashi)
Partly confirmedOnly the cold plunge bath is true source-fed kakenagashi; the main indoor and outdoor baths are heated and recirculated.Fresh spring water flows continuously through the bath
Heated
✓ YesReported by two visitors
Recirculated
✓ YesReported by two visitors
Chlorinated
✓ YesReported by two visitors
How we know this
- Indoor baths: There is one indoor bath, described as spacious and L-shaped. · 2 visitors, Jul 2026 – Aug 2026
- Outdoor bath: The facility has an outdoor stone bath in addition to the indoor bath. · 3 visitors, Jul 2026 – Aug 2026
- Outdoor baths: There is one outdoor stone-built bath. · 2 visitors, Jul 2026 – Aug 2026
- Sauna: A small sauna (roughly 4–5 person capacity) is available, though some found it not very hot. · 3 visitors, Jun 2026 – Aug 2026
- Cold bath: Two single-person cold plunge baths are fed directly by unheated spring water. · 3 visitors, Jun 2026 – Jul 2026
- Private bath: stated on the facility's website, read 2026-09
- Source temperature: The spring source temperature was measured at about 25°C. · 1 visitor, Aug 2026
- pH: The water is strongly alkaline, measured around pH 9.78–10, giving it a very slippery feel. · 2 visitors, Aug 2026
- Free-flowing (kakenagashi): Only the cold plunge bath is true source-fed kakenagashi; the main indoor and outdoor baths are heated and recirculated. · 2 visitors, Jun 2026
- Heated: Because the spring source is only about 25°C, the main baths are artificially heated. · 2 visitors, Jun 2026 – Aug 2026
- Recirculated: The main baths use filtered, recirculated water rather than a continuous source-fed flow. · 2 visitors, Jun 2026 – Aug 2026
- Chlorinated: A mild chlorine/disinfectant smell was noted by a couple of visitors as part of standard water treatment. · 2 visitors, Jul 2026 – Aug 2026
Practical
What you need
Soap & shampoo
✓ ProvidedStated on the facility's website
Lockers
✓ Coin returnedValuables are kept in a coin-return locker near the front desk, though one review described a simple keyed locker instead.Reported by two visitors
Payment
✓ Cards acceptedStated on the facility's website
Hair dryer
✓ YesReported by two visitors
Facilities
Rest area
✓ YesReported by two visitors
Restaurant
✓ YesReported by two visitors
How we know this
- Soap & shampoo: stated on the facility's website, read 2026-09
- Lockers: Valuables are kept in a coin-return locker near the front desk, though one review described a simple keyed locker instead. · 2 visitors, Aug 2026
- Payment: stated on the facility's website, read 2026-09
- Hair dryer: Free hair dryers are available in the changing area. · 2 visitors, Jul 2026 – Aug 2026
- Rest area: There is a rest area with a foot bath before the bathing area and a mist-cooled rest space near the outdoor bath. · 2 visitors, Aug 2026
- Restaurant: An on-site restaurant/dining area serves meals to bathing guests. · 2 visitors, Jun 2026 – Aug 2026
Getting there
How to get there
Nearest station
Ōyama cable5.0 km in a straight line; bus or taxi from the station
Address
1830 Nanasawa, Atsugi, Kanagawa 243-0121From the facility's listing
Show a driver
七沢荘The name in Japanese, for a taxi or at the counter
Phone
+8146-248-0236Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
nanasawasou.jpOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
Nearby
Other baths close by
Kiyokawa Village Fureai Center Bessho-no-Yu
3.8★ · 2.5 km · Kiyokawa
✓Day use✓Tattoos✓Outdoor bath✓Sauna
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Questions
Common questions
Can I visit Nanasawa-sō without staying overnight?
Multiple visitors used the bath as day-use guests between June and September, sometimes needing to queue on busy weekends.
How much does Nanasawa-sō cost?
Weekday admission was reported as 1,100 yen, while weekend/holiday prices of 1,300–1,700 yen were also mentioned in other reviews.
Is the water free-flowing spring water?
Only the cold plunge bath is true source-fed kakenagashi; the main indoor and outdoor baths are heated and recirculated.
