![SPA & SAUNA、Auberge Villa offers the finest cuisine in a private villa that can be rented out freely. [Best Rate Guarantee]](https://en.auberge-soso.com/wp-content/themes/hoshioto2020/images/common/logo.svg){kind=logo}
The Ultimate Totonou Experience, in a Space That's Entirely Your Own
Sauna "SAUNA DICE / BLACK EDITION" + Two Natural Hot Springs
SOSO is equipped with a black cube-shaped sauna by Saunature, a cold plunge fed by continuously flowing natural groundwater (coming soon), and two rare natural hot springs — Gold Onsen and Silver Onsen.
Here is our full course of contrast bathing, unlike anywhere else.
SAUNA DICE / BLACK EDITION
Private Sauna
SOSO's private sauna pairs the black cube-shaped Saunature Dice Pocket Black with a HUUM DROP 7 stove.
Inside, the sauna stove and stones sit against gently rounded wooden walls, quietly holding their heat.
Pull open the door, and you're welcomed by the sweet scent of ThermoWood®. Pour water over the stones, and steam rises with a soft hiss, warming the room as it reflects off the wood walls.
Enjoy a quiet moment, like watching the flames of a wood fire, at your own pace and at whatever temperature feels right to you.
Your Private Pool, as a Cold Plunge
Cold Plunge & Outdoor Air Rest
Once your body has reached its peak heat, step out to the pool right in front of the sauna. Since it's entirely private, you're free to dive into its full width without another soul in sight.
After cooling down in the pool, rest on the terrace for some outdoor air. The sea breeze off Miyazu Bay settles over your flushed skin, with nothing but the sound of the waves to hear.
On clear days, find your totonou beneath an endless blue sky; on rainy days, sink even deeper into it watching raindrops fall across the water's surface.
A rich totonou experience awaits you here, whatever the weather.
Two Natural Hot Springs, to Seal In the Afterglow of Totonou
Gold Onsen & Silver Onsen
SOSO is home to two rare natural hot springs. Rich in iron, the Gold Onsen begins colorless and clear, then turns a warm reddish brown as it oxidizes on contact with the air. With a faint scent of iron and a gentle, mineral-soft touch on the skin, it's a moment for both body and mind to exhale.
Thanks to its excellent heat retention, the warmth lingers long after you step out.
The Silver Onsen, meanwhile, is a weakly alkaline simple hot spring rich in metasilicic acid — a true "beauty bath." It wraps your sauna-warmed body in a gentle embrace, leaving your skin silky and smooth.
Sauna → cold plunge → Gold Onsen → Silver Onsen. Repeating this four-step contrast-bathing cycle as many times as you like, with no clock to watch, is a privilege found only at SOSO — where the entire villa is yours alone.
All-Inclusive ServiceEverything Prepared, Ready When You Are
Sauna ponchos and hats are yours to use freely throughout your visit. Alongside hojicha for löyly, we stock herbal tea, detox water, and oropo-style sauna drinks to look after a body that's been through the heat.
To finish, treat yourself to a chilled scoop of ice cream once you're out of the bath.
※Images are for illustrative purposes only. Contents may change depending on availability.
| Gold Onsen (Semi-Open-Air) | Silver Onsen (Indoor) | Sauna | |
|---|---|---|---|
| Type / Name | Sodium Chloride Strong Saline Spring | Weakly Alkaline Simple Spring | Saunature Dice Pocket Black |
| Character & Temperature | Reddish-brown, mineral-rich water (high in iron and salt) | Clear, colorless "beauty bath" (contains metasilicic acid) | Approx. 70–90°C (self-serve löyly available) |
| Cold Plunge / Equipment | - | - | Private pool used as a cold plunge (14–16°C in summer / 8–12°C in winter). A cold plunge fed by continuously flowing natural groundwater is planned for the future. |
| Benefits | Neuralgia, muscle pain, joint pain, frozen shoulder, fatigue recovery, and more | Osteoarthritis, lower back pain, neuralgia, sensitivity to cold, autonomic nervous instability, and more | Fatigue recovery, refreshment, and balancing the autonomic nervous system |
| Highlights | Highly antibacterial, with excellent heat retention that keeps you warm long after bathing | Promotes skin cell turnover, with a wonderfully soft touch on the skin | The scent of ThermoWood® and a genuine HUUM stove |
Frequently Asked Questions About the Hot Springs & Sauna
Q. How can I enjoy both the Gold Onsen and the Silver Onsen?
A. Our villa is equipped with two natural hot springs, each with its own distinct character, so you can enjoy an onsen-hopping experience without ever leaving the building. Move between the semi-open-air Gold Onsen and the always-cozy indoor Silver Onsen, alternating between their different benefits for a truly blissful soak.
Q. What can you tell me about the Gold Onsen's water quality and benefits?
A. Rich in iron, the Gold Onsen warms you from the core and is said to be beneficial for muscle and joint pain as well as sensitivity to cold. Let the view from the semi-open-air bath soothe your body and mind together.
Q. What kind of hot spring is the Silver Onsen?
A. It's a "beauty bath," rich in the natural moisturizing compound metasilicic acid. It promotes skin cell turnover, leaving your skin feeling silky smooth after bathing. Since it's indoors, you can enjoy it at your leisure regardless of the weather.
Q. What are the temperature and features of the private sauna?
A. You can adjust the temperature to your liking, anywhere from about 70°C to 90°C. It's equipped with a genuine HUUM stove for self-serve löyly, so you can experience deep relaxation surrounded by the scent of ThermoWood®.
Q. Can I do self-serve löyly?
A. Yes, you can. Pour aromatic water over the sauna stones to create the humidity and heat that suit you best. Enjoy a blissful moment wrapped in steam, entirely at your own pace.
Q. How should I cool down after the sauna?
A. Use the private pool right in front of you as your cold plunge — a refreshing 14–16°C in summer and 8–12°C in winter. (A cold plunge fed by natural groundwater is planned for the future.) Afterward, head to the terrace for outdoor air rest and experience the ultimate totonou as you feel the sea breeze.