Right Onsen › Tokyo › Itabashi City
Kosen-yu
3.8★ · 183 Google ratings · Itabashi City, Tokyo · 功泉湯
✓ Day visitors✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesFrom the facility's listing
Hours
15:00–23:00From the facility's listing
Closed
WednesdayWeekly closing days from the listing
Tattoos
? Call aheadNo policy stated in the 26 recent reviews we read
Price
¥950 adultReported by two visitors
Bathing
Men's and women's sides swap by timeConfirmed by recent visitor reports
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
- Price: A 2026 review states ¥950 for admission with sauna, while a 2024 review reported ¥520 for admission without sauna. · 2 visitors, Jun 2024 – Apr 2026
- Bathing arrangement: Reviewers from 2024 to 2026 consistently report that the men's and women's bathing areas swap weekly (usually on Thursdays). · 3 visitors, Nov 2024 – Oct 2025
The bath
What you’ll find
Kosen-yu is a traditional wood-fired Tokyo sento with weekly gender-swapped baths, several tubs (electric, jet, medicated), a hot sauna, and a strong-flow cold plunge; admission runs about ¥520 without sauna or ¥950 with sauna, paid by cash or PayPay.
Bath setup
Indoor baths
4Reported by two visitors
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
Rest area
✓ YesReported by two visitors
Spring water
Heated
✓ YesReported by two visitors
How we know this
- Indoor baths: Two reviews from 2024 and 2025 describe about four different indoor tubs (e.g., jet, medicated, electric, water bath). · 2 visitors, Jun 2024 – Jul 2025
- Sauna: Reviewers from 2024 to 2026 consistently describe a paid sauna, sometimes recently renovated and very hot. · 3 visitors, Apr 2026 – Aug 2026
- Cold bath: Multiple reviews from 2024 to 2026 describe a flowing or jetted cold water bath, generally around 10-20°C. · 3 visitors, Apr 2026 – Aug 2026
- Rest area: Reviews from 2024 and 2025 mention an outdoor air-bathing rest area accessible from the changing room, though seating is limited. · 2 visitors, Nov 2024 – May 2025
- Heated: Reviews from 2024 and 2026 note the water is heated using a traditional wood-fired boiler. · 2 visitors, Dec 2024 – Jun 2026
Guide
Good to know
Towels
One 2026 review said no rental towels are available, while a 2024 review noted a large towel is included when paying the sauna fee.
Reported by two visitorsPractical
What you need
Towels
Bring your ownReported by two visitors
Payment
✓ Cards & QR acceptedReported by two visitors
How we know this
- Towels: One 2026 review said no rental towels are available, while a 2024 review noted a large towel is included when paying the sauna fee. · 2 visitors, Dec 2024 – Apr 2026
- Payment: Reviewers in 2025 and 2026 confirmed PayPay is accepted for payment. · 2 visitors, May 2025 – Apr 2026
Timing
When to go
Quietest Thursday around 15:00. Busiest Sunday around 18:00.
| 8A | 9A | 10A | 11A | 12P | 13P | 14P | 15P | 16P | 17P | 18P | 19P | 20P | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MO | |||||||||||||
| TU | |||||||||||||
| WE | |||||||||||||
| TH | |||||||||||||
| FR | |||||||||||||
| SA | |||||||||||||
| SU |
Quiet Busy
Based on Google visit patterns, not a forecast.
Weekly hours
| Day | Hours |
|---|---|
| Monday | 15:00–23:00 |
| Tuesday | 15:00–23:00 |
| Wednesday | Closed |
| Thursday | 15:00–23:00 |
| Friday | 15:00–23:00 |
| Saturday | 15:00–23:00 |
| Sunday | 15:00–23:00 |
Closed Wednesday.
Getting there
How to get there
Nearest station
HasuneAbout 10 min on foot, 0.8 km in a straight line
Address
2 Chome-17-20 Nishidai, Itabashi City, Tokyo 175-0045From the facility's listing
Show a driver
功泉湯The name in Japanese, for a taxi or at the counter
Phone
+813-3933-2904Japanese-speaking. For tattoos or private baths a call is the only sure answer
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What matters
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Questions
Common questions
Can I visit Kosen-yu without staying overnight?
Listed as a sento (public bathhouse): a bath for day visitors by definition. No visitor review states otherwise.
How much does Kosen-yu cost?
A 2026 review states ¥950 for admission with sauna, while a 2024 review reported ¥520 for admission without sauna.
