A natural hot spring at Miyako Resort Okushima Aqua Forest with a spectacular view of Ago Bay
Mie Shima City
"Tomoyama no Yu" is a natural hot spring facility located inside Miyako Resort Okushima Aqua Forest in Shima City, Mie Prefecture. It offers separate dry saunas for men and women, as well as cold plunge baths, allowing guests to work up a proper sweat in a clean, resort-hotel atmosphere. Its greatest appeal is the open-air bath, where you can soak while enjoying the beautiful view of Ago Bay. The spring is a sodium-calcium chloride spring, known for its strong heat-retaining properties and for keeping you warm long after you get out. The facility is also well equipped, with ReFa shower heads installed at every washing area.
TypeNatural Hot Spring
A natural hot spring using a sodium-calcium chloride spring that rises from underground. Rich in salt, it warms your body deeply when you bathe, and the warmth lingers long after you get out. While admiring the beautiful view of Ago Bay, you can fully enjoy this famous heat-retaining spring to your heart's content.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A dry sauna with a convection stove, located in the separate baths for men and women. In this quiet, TV-free space, you can slowly work up a sweat while focusing on yourself. Enjoy an authentic sauna experience in the calm atmosphere unique to a resort hotel.
Water QualityTap Water
Capacity5people
A cold plunge bath located right next to the sauna room. The water temperature is mild and easy to enter, gently and comfortably cooling down your overheated body after the sauna. Even if you are not fond of very cold cold plunge baths, you can relax and sink in with confidence.
Closed Days: None
3F, 3238-1 Funakoshi, Daio-cho, Shima City, Mie 517-0604
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more
A natural hot spring at Miyako Resort Okushima Aqua Forest with a spectacular view of Ago Bay
Mie Shima City
"Tomoyama no Yu" is a natural hot spring facility located inside Miyako Resort Okushima Aqua Forest in Shima City, Mie Prefecture. It offers separate dry saunas for men and women, as well as cold plunge baths, allowing guests to work up a proper sweat in a clean, resort-hotel atmosphere. Its greatest appeal is the open-air bath, where you can soak while enjoying the beautiful view of Ago Bay. The spring is a sodium-calcium chloride spring, known for its strong heat-retaining properties and for keeping you warm long after you get out. The facility is also well equipped, with ReFa shower heads installed at every washing area.
TypeNatural Hot Spring
A natural hot spring using a sodium-calcium chloride spring that rises from underground. Rich in salt, it warms your body deeply when you bathe, and the warmth lingers long after you get out. While admiring the beautiful view of Ago Bay, you can fully enjoy this famous heat-retaining spring to your heart's content.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A dry sauna with a convection stove, located in the separate baths for men and women. In this quiet, TV-free space, you can slowly work up a sweat while focusing on yourself. Enjoy an authentic sauna experience in the calm atmosphere unique to a resort hotel.
Water QualityTap Water
Capacity5people
A cold plunge bath located right next to the sauna room. The water temperature is mild and easy to enter, gently and comfortably cooling down your overheated body after the sauna. Even if you are not fond of very cold cold plunge baths, you can relax and sink in with confidence.
Closed Days: None
3F, 3238-1 Funakoshi, Daio-cho, Shima City, Mie 517-0604
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more