Right Onsen › Kanagawa › Kawasaki
Masa-no-Yu
3.9★ · 308 Google ratings · Kawasaki, Kanagawa · 政之湯
✓ Day visitors✓ Sauna
Before you go
Can you bathe here?
Day visitors
✓ YesConfirmed by recent visitor reports
Hours
14:00–00:00From the facility's listing
Closed
6th, 16th, 26th of each monthConfirmed by recent visitor reports
Tattoos
? Call aheadNo policy stated in the 38 recent reviews we read or on the facility's website
Price
¥550 adultRecent visitor reports indicate a change. The official site still lists ¥570
Child price
¥250Stated on the facility's website
How we know this
- Day visitors: Multiple visitors successfully bathed as day-use guests in 2025–2026. · 3 visitors, Sep 2025 – Aug 2026
- Closed: Reviews from July 2025 state closure on 6th, 16th, 26th; one earlier report mentioned 21st as variable. · 3 visitors, Jul 2025
- Price: Standard admission 550 yen as of 2025–2026; one January 2026 report noted 550 yen; 2026-09 mentioned 570 yen. · 3 visitors, Aug 2025 – Jan 2026
- Child price: stated on the facility's website, read 2026-09
Atmosphere
The bath
What you’ll find
Retro public bathhouse near Kawasaki Station with natural black mineral spring water, sauna, and modest admission fee.
Bath setup
Indoor baths
2.0Reported by two visitors
Outdoor bath
✕ NoReported by one visitor
Sauna
✓ YesConfirmed by recent visitor reports
Cold bath
✓ YesConfirmed by recent visitor reports
Spring water
Spring type
black iron sulfate mineral springConfirmed by recent visitor reports
Bath temperature
42°CReported by two visitors
How we know this
- Indoor baths: Two main bathing pools: a larger communal bath and a smaller medicinal/special bath (2–5 person capacity). · 2 visitors, Aug 2025 – Sep 2025
- Outdoor bath: No outdoor bathing area. · 1 visitor, Sep 2025
- Sauna: Sauna available for an extra 200 yen; capacity very limited (fits about 4 people); room temperature around 105°C. · 3 visitors, Aug 2025 – Aug 2026
- Cold bath: Small cold-water bath present; one review reports 18°C temperature; capacity typically one person. · 3 visitors, Sep 2025 – Mar 2026
- Spring type: Natural black mineral hot spring (morel-type underground spring); also called (Kawasaki natural hot spring). · 3 visitors, Jan 2026 – Jun 2026
- Bath temperature: Black hot spring approximately 42°C; temperature varies by bath; slightly lower than typical sento but hotter than hotel tubs. · 2 visitors, Oct 2025 – Mar 2026
Practical
What you need
Towels
Rental availableConfirmed by recent visitor reports
Soap & shampoo
For sale at the counterStated on the facility's website
Lockers
✓ FreeReported by two visitors
Payment
✕ Cash onlyOne 2026-09 review explicitly states cash only, no cashless payment accepted.Reported by two visitors
Hair dryer
✓ YesConfirmed by recent visitor reports
Facilities
Rest area
✓ YesConfirmed by recent visitor reports
How we know this
- Towels: Hand towel rental 30 yen; bath towel rental 100 yen; optional with admission. · 3 visitors, Oct 2025 – Aug 2026
- Soap & shampoo: Rinse-in shampoo and body soap provided at washing stations; one review notes small quantities and suggests bringing own toiletries. · stated on the facility's website, read 2026-09 · 3 visitors, Oct 2025 – Jul 2026 · visitors report Provided (3 visitors)
- Lockers: Shoe-locker key exchanged at counter for locker key; free lockers, no coin required. · 2 visitors, Jan 2026 – Aug 2026
- Payment: One 2026-09 review explicitly states cash only, no cashless payment accepted. · 2 visitors, Jan 2026 – Sep 2026
- Hair dryer: Free hair dryers available; at least two units mentioned. · 4 visitors, Jul 2025 – Jun 2026
- Rest area: Small rest area with TV and vending machine; seating limited; one review notes few chairs available. · 3 visitors, Aug 2025 – Aug 2026
Timing
When to go
Quietest Monday around 23:00. Busiest Tuesday around 20:00.
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Quiet Busy
Based on Google visit patterns, not a forecast.
Weekly hours
| Day | Hours |
|---|---|
| Monday | 14:00–00:00 |
| Tuesday | 14:00–00:00 |
| Wednesday | 14:00–00:00 |
| Thursday | 14:00–00:00 |
| Friday | 14:00–00:00 |
| Saturday | 14:00–00:00 |
| Sunday | 14:00–00:00 |
Closed 6th, 16th, 26th of each month.
Getting there
How to get there
Nearest station
Kawasaki · JR East · KWSAbout 7 min on foot, 0.5 km in a straight line
Address
2-4 Minamimachi, Kawasaki Ward, Kawasaki, Kanagawa 210-0015From the facility's listing
Show a driver
政之湯The name in Japanese, for a taxi or at the counter
Phone
+8144-222-3256Japanese-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
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What matters
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Questions
Common questions
Can I visit Masa-no-Yu without staying overnight?
Multiple visitors successfully bathed as day-use guests in 2025–2026.
How much does Masa-no-Yu cost?
Standard admission 550 yen as of 2025–2026; one January 2026 report noted 550 yen; 2026-09 mentioned 570 yen.
