Right Onsen › Kanagawa › Kawasaki
Maruko Onsen
3.8★ · 276 Google ratings · Kawasaki, Kanagawa · 丸子温泉
✓ Day visitors
Before you go
Can you bathe here?
Day visitors
✓ YesConfirmed by recent visitor reports
Hours
Not publishedCheck the official site
Tattoos
? Call aheadNo policy stated in the 45 recent reviews we read or on the facility's website
Price
¥530 adultConfirmed by recent visitor reports
Bathing
Men and women separateReported by two visitors
How we know this
- Day visitors: Multiple visitors used it as a day-use bath from 2024–2025, paying 530 yen admission. · 4 visitors, Aug 2024 – Jun 2025
- Price: Standard admission 530 yen confirmed in reviews from Feb 2024–Aug 2024; no price change mentioned. · 3 visitors, Apr 2024 – Feb 2025
- Bathing arrangement: Separate male and female entrances and bathing areas (left female, right male). · 2 visitors, Apr 2024 – Aug 2024
Atmosphere
The bath
What you’ll find
Retro black-hot-spring sentouin (public bath) in Shin-Maruko, closed June 2025; highly heated mineral water, no sauna, counter-style ticketing.
Bath setup
Indoor baths
2.0Reported by two visitors
Outdoor bath
✕ NoConfirmed by recent visitor reports
Sauna
✕ NoReported by two visitors
Cold bath
✕ NoConfirmed by recent visitor reports
Spring water
Spring type
sodium-calcium sulfate-chlorideReported by two visitors
Source temperature
20°CReported by two visitors
Bath temperature
44°CBlack mineral bath consistently reported at 42–46°C (most often 44–45°C); clear bath slightly hotter.Confirmed by recent visitor reports
pH
pH 8.3Reported by one visitor
Heated
✓ YesConfirmed by recent visitor reports
How we know this
- Indoor baths: Two communal bathing pools: one with clear water and massage jets, one black mineral spring. · 2 visitors, Apr 2024 – Feb 2025
- Outdoor bath: Reviewers confirm no outdoor bath; indoor only. · 3 visitors, Feb 2025 – Jun 2025
- Sauna: Consistently reported as having no sauna across multiple 2024–2025 visits. · 2 visitors, Jul 2024 – May 2025
- Cold bath: No cold/ice bath available; visitors note the absence and express wish for one. · 3 visitors, Apr 2024 – May 2025
- Spring type: Alkaline chloride spring; TDS 2049 mg/kg, pH 8.3; dark color from iron and other minerals. · 2 visitors, Feb 2025
- Source temperature: Source temperature approximately 20°C from 160 m underground. · 2 visitors, Mar 2024 – Apr 2024
- Bath temperature: Black mineral bath consistently reported at 42–46°C (most often 44–45°C); clear bath slightly hotter. · 3 visitors, Jun 2024 – Feb 2025
- pH: pH 8.3 measured in February 2025. · 1 visitor, Feb 2025
- Heated: Source water (20°C from 160 m depth) is heated before use. · 3 visitors, Mar 2024 – Jun 2025
Practical
What you need
Towels
Rental availableTowel sold (not rented back), priced 200–250 yen; no included towel service.Confirmed by recent visitor reports
Payment
✓ Cards acceptedReported by two visitors
Hair dryer
✓ YesReported by two visitors
Facilities
Rest area
✕ NoNo dedicated rest or waiting area; only one bench in changing room (second floor closed).Reported by two visitors
Lodging
✕ NoConfirmed by recent visitor reports
How we know this
- Towels: Towel sold (not rented back), priced 200–250 yen; no included towel service. · 3 visitors, Sep 2024 – Feb 2025
- Payment: PayPay mobile payment accepted; ticket passes also honored. · 2 visitors, Apr 2024 – Sep 2024
- Hair dryer: Coin-operated hair dryer available for 20 yen. · 2 visitors, Sep 2024 – Dec 2024
- Rest area: No dedicated rest or waiting area; only one bench in changing room (second floor closed). · 2 visitors, Jul 2024 – Feb 2025
- Lodging: Public bathing facility only; no lodging offered. · 9 visitors, Feb 2024 – Jun 2025
Getting there
How to get there
Nearest station
Shin-maruko · Tokyu · TY10;MG10About 2 min on foot, 0.2 km in a straight line
Address
Takabiru, 675-644 Shinmarukomachi, Nakahara Ward, Kawasaki, Kanagawa 211-0005〒211-0005 Kanagawa, Kawasaki, Nakahara Ward, Shinmarukomachi, ６７５−644 高ビル · From the facility's listing
Show a driver
丸子温泉The name in Japanese, for a taxi or at the counter
Phone
+8144-711-3378Japanese-speaking. For tattoos or private baths a call is the only sure answer
Website
k-o-i.jpOfficial, in Japanese
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Questions
Common questions
Can I visit Maruko Onsen without staying overnight?
Multiple visitors used it as a day-use bath from 2024–2025, paying 530 yen admission.
How much does Maruko Onsen cost?
Standard admission 530 yen confirmed in reviews from Feb 2024–Aug 2024; no price change mentioned.
