Right Onsen › Tokyo › Ota City
Masu-no-Yu
4.2★ · 1,007 Google ratings · Ota City, Tokyo · COCOFURO ますの湯
✓ Day visitors✓ Kakenagashi✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesFrom the facility's listing
Hours
06:00–00:00From the facility's listing
Tattoos
? Call aheadNo policy stated in the 41 recent reviews we read
How we know this
- Day visitors: Listed as a sento (public bathhouse): a bath for day visitors by definition. No visitor review states otherwise. · from the listing category
The bath
What you’ll find
Masu-no-Yu is a small neighborhood sento near Kugahara Station offering natural black spring water and a carbonated bath, plus a sauna that now costs an extra fee; note that IC-card/electronic payment has been intermittently unavailable, so bring cash.
Bath setup
Indoor baths
2Confirmed by recent visitor reports
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
Rest area
✓ YesConfirmed by recent visitor reports
Spring water
Spring type
black hot spring waterConfirmed by recent visitor reports
Free-flowing (kakenagashi)
✓ FullFresh spring water flows continuously through the bath
How we know this
- Indoor baths: There are two main indoor tubs: a hotter black spring water bath and a cooler carbonated bath. · 3 visitors, May 2026 – Jul 2026
- Sauna: The sauna is present but now requires a separate 100 yen fee, with an auto-loyly steam release every 15 minutes; reviewers from 2026-05 to 2026-09 describe it as small and very hot. · 3 visitors, Jun 2026 – Sep 2026
- Cold bath: The cold plunge is a single-person tub filled with natural black spring water, often causing waits during busy times. · 3 visitors, May 2026 – Aug 2026
- Rest area: There is a lobby/rest area with manga available for lounging after bathing. · 3 visitors, May 2026 – Aug 2026
- Spring type: Reviewers from 2026-05 to 2026-09 consistently describe the main bath as dark 'kuroyu' black spring water. · 3 visitors, May 2026 – Jul 2026
- Free-flowing (kakenagashi): The black spring water bath is run on a source-fed (kakenagashi) basis, though it is heated before use. · 3 visitors, Jun 2026 – Aug 2026
Guide
Good to know
Payment
Between 2026-05 and 2026-07, IC card/electronic payment (Suica/Pasmo) was reported as temporarily unavailable, requiring cash.
Confirmed by recent visitor reportsSauna
The sauna is present but now requires a separate 100 yen fee, with an auto-loyly steam release every 15 minutes; reviewers from 2026-05 to 2026-09 describe it as small and very hot.
Confirmed by recent visitor reportsPractical
What you need
Towels
Rental availableConfirmed by recent visitor reports
Soap & shampoo
✓ ProvidedConfirmed by recent visitor reports
Payment
✕ Cash onlyConfirmed by recent visitor reports
Hair dryer
✓ YesConfirmed by recent visitor reports
How we know this
- Towels: Rental towel sets are available for a fee (around 280 yen), and branded towels can also be purchased. · 3 visitors, Jun 2026 – Jul 2026
- Soap & shampoo: Shampoo and body soap are provided free at the washing stations, with tissues and cotton swabs also supplied. · 3 visitors, Jun 2026 – Sep 2026
- Payment: Between 2026-05 and 2026-07, IC card/electronic payment (Suica/Pasmo) was reported as temporarily unavailable, requiring cash. · 3 visitors, May 2026 – Jul 2026
- Hair dryer: Hair dryers are provided free of charge at the changing area. · 3 visitors, Jun 2026 – Sep 2026
Timing
When to go
Quietest Monday around 6:00. Busiest Friday around 19:00.
| 8A | 9A | 10A | 11A | 12P | 13P | 14P | 15P | 16P | 17P | 18P | 19P | 20P | |
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Quiet Busy
Based on Google visit patterns, not a forecast.
Weekly hours
| Day | Hours |
|---|---|
| Monday | 06:00–00:00 |
| Tuesday | 06:00–00:00 |
| Wednesday | 06:00–00:00 |
| Thursday | 06:00–00:00 |
| Friday | 06:00–00:00 |
| Saturday | 06:00–00:00 |
| Sunday | 06:00–00:00 |
Getting there
How to get there
Nearest station
KugaharaAbout 1 min on foot, 0.0 km in a straight line
Address
2-1-23 Minamikugahara, Ota City, Tokyo 146-0084〒146-0084 Tokyo, Ota City, Minamikugahara, 2 Chome−1−23 メゾン久が原 1階 · From the facility's listing
Show a driver
COCOFURO ますの湯The name in Japanese, for a taxi or at the counter
Phone
+813-6410-4797Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
cocofuro.comOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
Nearby
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What matters
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Questions
Common questions
Can I visit Masu-no-Yu without staying overnight?
Listed as a sento (public bathhouse): a bath for day visitors by definition. No visitor review states otherwise.
Is the water free-flowing spring water?
The black spring water bath is run on a source-fed (kakenagashi) basis, though it is heated before use.
