Tenzen Radon Onsen
平畑温泉 寿楽荘
A Toyota City rest facility with a genuine radon-spring indoor bath
Day Use
YesClosed for New Year (December 28 to January 4). Hours may also change, or the facility may close on short notice, during storm warnings or evacuation orders.
The 500 yen rate is for Toyota City residents aged 60 and over, or disability certificate holders, shown at check-in; everyone else pays the standard 800 yen adult rate. Elementary and junior high school students pay 500 yen, and preschoolers bathe free.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
The outdoor bath is heated plain water, not the natural spring; the onsen water is in the indoor bath.
Enclosed indoor bathing area
Bathing Arrangements
A private bath you can reserve for yourself or your group
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Welcomes children and families
A restaurant or dining room open to visitors, not only meals for overnight guests
Lunch is available to day-use guests until 13:00; the evening day-use session has no meal service.
Towels to rent or borrow at the desk
Towels are not lent, but can be bought at the shop; bringing your own saves the cost.
On-site or nearby parking available
About
This is a Toyota City rest facility built mainly to support local seniors' health, though anyone can stay or bathe here regardless of age or residence. The indoor bath is the real draw: a genuine, undiluted natural radon spring, plain and unfussy rather than dressed up. An outdoor bath sits alongside it but uses heated plain water rather than the spring itself. A reservation-only private bath has been open since 2022, and the dining hall serves kaiseki (会席) dinner courses to overnight guests plus a same-day lunch menu for day-use bathers. The mood throughout is homely and unhurried rather than polished, in a quiet natural setting with a mahjong table and a lounge with a view.
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Last updated September 29, 2026