sauna and cold plunge · Ageo, Japan
Tennen Onsen Hanasaki no Yu
Spa not a bathhouse: here the bath is part of another programme
A day bathing complex in Ageo with its own spring drawn from 1,500 m, open-air pools of flowing spring water, an auto-loyly sauna, a cold bath and mixed-access hot-stone rooms.
The full record, with the available operating, price and research data, is free for Bathhouse subscribers.
Venue information
- Address
- 570 Haraichi, Ageo, Saitama 362-0021
- City
- Ageo, Japan
- Status
- Open
- Access
- Drop-in
Features
- Type
- Day spa
- Heat
- Onsen / hot springsFinnish sauna
- Cold
- Cold plunge
- Setting
- Thermal springUrban
- Access
- Drop-in
- Social model
- Gender separated
- Amenities
- Restaurant / barTreatments and massageParking
How it works
The operator lists its own "Hanasaki no Yu" spring, drawn from 1,500 m. Outdoors there is a flowing spring-water bath, a tub bath, a high-concentration carbonated bath and a lie-down bath; indoors a microbubble bath, an electric bath, a jet bath and a cold bath. The sauna has an automatic loyly every hour. Bathing runs 8am to midnight on weekdays and 8am to 1am on weekends and holidays, with last entry an hour before closing. The hot-stone rooms (3 rooms, 7 types) are mixed areas with no time limit, sold as a separate package. There is the Lotus Cafe restaurant, a massage and beauty salon and free parking for 280 cars.
Paid walk-in entry at the front desk, with no time limit.
Frequently asked questions
Where is Tennen Onsen Hanasaki no Yu?
Tennen Onsen Hanasaki no Yu is at 570 Haraichi, Ageo, Saitama 362-0021, in Ageo, Japan.
What does Tennen Onsen Hanasaki no Yu have?
The published features include onsen / hot springs, finnish sauna, cold plunge, restaurant / bar, treatments and massage and parking.
How does access to Tennen Onsen Hanasaki no Yu work?
The published access models include drop-in. Check the current schedule and conditions on the official site before visiting.
Is Tennen Onsen Hanasaki no Yu open?
The status recorded by Bathhouse is: Open. The research was updated on 2026-10-14; confirm recent changes with the operator directly.
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About this research
Desk research updated on 2026-10-14; anything the operator has not published stays open. Bathhouse separates what the operator publishes from what was measured on a visit, and leaves unverified fields empty.
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