Right Onsen › Kanagawa › Yokohama
Koyamayu
3.5★ · 193 Google ratings · Yokohama, Kanagawa · 小山湯
✓ Day visitors✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesFrom the facility's listing
Hours
09:30–21:00From the facility's listing
Closed
Thursday, FridayWeekly closing days from the listing
Tattoos
? Call aheadNo policy stated in the 43 recent reviews we read or on the facility's website
Price
¥570 adultStated on the facility's website
Child price
¥250Stated on the facility's website
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: stated on the facility's website, read 2026-09
- Child price: stated on the facility's website, read 2026-09
Atmosphere
The bath
What you’ll find
Koyamayu is a century-old neighborhood public bathhouse (sento) near Ishikawacho/Chinatown in Yokohama, known for very hot tubs (often 45-50°C), a free mist sauna, and no cold plunge bath; bring or rent a towel.
Bath setup
Indoor baths
2.0Confirmed by recent visitor reports
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✕ NoConfirmed by recent visitor reports
Spring water
Bath temperature
48°CBath temperatures are frequently reported as very hot, ranging from about 45°C to over 50°C depending on the day, causing some bathers to be unable to enter.Confirmed by recent visitor reports
How we know this
- Indoor baths: The bathing room has two indoor tubs, typically one very hot and one warmer/medicated bath, reported from 2024 to 2026. · 3 visitors, Dec 2024 – Apr 2026
- Sauna: Multiple reviewers describe a small, free mist/steam sauna included with admission from 2024 to 2026. · 3 visitors, Aug 2024 – May 2026
- Cold bath: Reviewers consistently state there is no cold plunge bath, only a strong cold-water shower head instead. · 3 visitors, Dec 2024 – Feb 2026
- Bath temperature: Bath temperatures are frequently reported as very hot, ranging from about 45°C to over 50°C depending on the day, causing some bathers to be unable to enter. · 3 visitors, Jun 2024 – Feb 2026
Practical
What you need
Towels
Rental availableTowel rental used to be free but became a paid service around 2023-2024, and towels can be borrowed for a fee at the counter.Reported by two visitors
Soap & shampoo
For sale at the counterStated on the facility's website
Payment
✓ Cards acceptedReported by two visitors
Hair dryer
✓ YesConfirmed by recent visitor reports
How we know this
- Towels: Towel rental used to be free but became a paid service around 2023-2024, and towels can be borrowed for a fee at the counter. · 2 visitors, Jul 2024 – Dec 2024
- Soap & shampoo: Body soap, shampoo, and often shaving cream are provided free at the washing stations, noted repeatedly from 2024 to 2026. · stated on the facility's website, read 2026-09 · 3 visitors, Jul 2024 – Feb 2026 · visitors report Provided (3 visitors)
- Payment: Reviewers report that IC transit cards (Suica) and PayPay are accepted for payment. · 2 visitors, Jul 2024 – Jan 2025
- Hair dryer: Hair dryers are free to use, mentioned consistently from 2024 through 2026, though output power is described as weak. · 3 visitors, Jun 2024 – Mar 2026
Timing
When to go
Quietest Sunday around 20:00. Busiest Saturday 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 | 09:30–21:00 |
| Tuesday | 09:30–21:00 |
| Wednesday | 09:30–21:00 |
| Thursday | Closed |
| Friday | Closed |
| Saturday | 09:30–21:00 |
| Sunday | 09:30–21:00 |
Closed Thursday, Friday.
Getting there
How to get there
Nearest station
Ishikawacho · JR East · JK09About 4 min on foot, 0.3 km in a straight line
Address
Grace Motomachi, 3-106-4 Ishikawacho, Naka Ward, Yokohama, Kanagawa 231-0868〒231-0868 Kanagawa, Yokohama, Naka Ward, Ishikawacho, 3 Chome−106-4 グレース元町 · From the facility's listing
Show a driver
小山湯The name in Japanese, for a taxi or at the counter
Phone
+8145-641-5708Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
k-o-i.jpOfficial, in Japanese
The map loads only when you ask for it and connects your browser to Google.
Nearby
Other baths close by
Find another
Not the right bath?
Where are you starting from?
More options
What matters
Contribute
Been here recently?
Help other visitors with fresh information about Koyamayu. Everything below is optional except the last box.
Questions
Common questions
Can I visit Koyamayu without staying overnight?
Listed as a sento (public bathhouse): a bath for day visitors by definition. No visitor review states otherwise.
