Ninomaru Onsen
"Ninomaru Onsen" is a day-use hot spring facility located in Yuasa Town, Arida District, Wakayama Prefecture. The alkaline simple hot spring with a pH of 10 is known as a "beauty skin bath," smoothing the skin. You can enjoy bathing while listening to the murmuring of the river in the cypress-built indoor bath and the open-air bath facing the Yamada River. Refresh your body and mind with an authentic sauna and cold plunge bath, and savor local flavors like Yuasa soy sauce ramen in the on-site dining hall. Cottages are also available for overnight stays, allowing you to spend a day surrounded by rich nature.
Facility Name
Ninomaru Onsen
Facility Type
Onsen & Spa
Address
1638-1 Yamada, Yuasa-cho, Arida-gun, Wakayama Prefecture
Closed Days
木
Business Hours
Monday 10:00〜21:30
Tuesday 10:00〜21:30
Wednesday 10:00〜21:30
Thursday 定休日
Friday 10:00〜21:30
Saturday 08:00〜21:30
Sunday 08:00〜21:30
Holiday 08:00〜21:30
♨️Hot Spring Information
♨️
Yuasa Town Onsen
Natural Hot Spring
The alkaline simple hot spring with a pH of 10, gushing from underground, is cherished as a "beauty skin bath." The water feels very soft, almost as if it envelops the skin. Enjoy it in the cypress-built indoor bath and the open-air bath facing the Yamada River, and feel your skin become smooth after bathing. The alkaline spring quality gently removes old keratin, leading to clear skin. It is expected to be effective for fatigue recovery and neuralgia, and when combined with the sauna, provides an even deeper relaxation effect.
Sauna & Cold Bath Information
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Sauna
Male
95°C
An authentic Finnish-style sauna where high-temperature dry heat envelops the entire body. In the men's bath, staff regularly perform löyly services, which quickly draw out sweat with heat waves. The scent of wood is pleasant, allowing for a thorough warming of the body. Renovated in 2025, it offers an even more comfortable environment.
Sauna Type
Dry Sauna
Stove Type
Convection Stove (Sauna Stone)
Capacity
12people
❄️
Cold Bath
Male
15°C
A cold plunge bath to tighten the body heated in the sauna. The coldness allows for a leisurely dip, making it perfect for cooling down. The transition from sauna to cold plunge bath is smooth, allowing for immediate cooling. After the cold plunge bath, enjoy an outdoor air bath in the open-air bath area for a pleasant totonou experience with the murmuring of the Yamada River.
Water Quality
Groundwater