Aoshima sea breeze and 100% source cold plunge bath, a hidden gem with silky cold mineral spring
Miyazaki Miyazaki City
Shinwa no Yu is the hot spring facility inside Aoshima Fisherman's Beachside Hostel & Spa located in the sightseeing area of Aoshima in Miyazaki City. Its biggest draw is the cold plunge bath next to the sauna. The facility uses the source water of an alkaline simple sulfur cold mineral spring directly as a flowing source, offering an unbelievably silky and slippery ultimate texture. After working up a sweat in the dry sauna and soaking in the superb source cold plunge bath, you can relax in the rest area equipped with hammocks and a manga corner. For 700 yen for adults you can bathe all day as many times as you like, making this a high-quality sauna facility in the Aoshima area.
TypeNatural Hot Spring
An alkaline simple sulfur cold mineral spring boasting a pH of 9.4. It is a high-quality water with strong beautifying effects that leave the skin smooth. The inner bath wall features a dramatic painting of Mount Fuji by Japanese painter Shuhei Tateyama. There is also an open-air bath flowing directly with source water where you can feel the Aoshima sea breeze, and private reserved baths are available.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity8people
A compact dry sauna with two-tier benches. The temperature is set between 85°C to 90°C, and it has a solid level of humidity that lets you sweat gently. A TV is installed next to the seating. It can feel cramped when busy, but during quiet times it is very comfortable.
Water QualityHot Spring Water
Capacity2people
A luxurious cold plunge bath fed directly by the source of a natural alkaline simple sulfur cold mineral spring. It is slightly cloudy and, like the onsen, is characterized by an exceptionally silky and slippery texture. The water temperature is mild, and wrapped in the scent of sulfur and a smooth skin feel, you may want to stay in it forever.
Closed Days: None
4-1-3 Aoshima, Miyazaki City, Miyazaki Prefecture 889-2162, Japan
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
Aoshima sea breeze and 100% source cold plunge bath, a hidden gem with silky cold mineral spring
Miyazaki Miyazaki City
Shinwa no Yu is the hot spring facility inside Aoshima Fisherman's Beachside Hostel & Spa located in the sightseeing area of Aoshima in Miyazaki City. Its biggest draw is the cold plunge bath next to the sauna. The facility uses the source water of an alkaline simple sulfur cold mineral spring directly as a flowing source, offering an unbelievably silky and slippery ultimate texture. After working up a sweat in the dry sauna and soaking in the superb source cold plunge bath, you can relax in the rest area equipped with hammocks and a manga corner. For 700 yen for adults you can bathe all day as many times as you like, making this a high-quality sauna facility in the Aoshima area.
TypeNatural Hot Spring
An alkaline simple sulfur cold mineral spring boasting a pH of 9.4. It is a high-quality water with strong beautifying effects that leave the skin smooth. The inner bath wall features a dramatic painting of Mount Fuji by Japanese painter Shuhei Tateyama. There is also an open-air bath flowing directly with source water where you can feel the Aoshima sea breeze, and private reserved baths are available.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity8people
A compact dry sauna with two-tier benches. The temperature is set between 85°C to 90°C, and it has a solid level of humidity that lets you sweat gently. A TV is installed next to the seating. It can feel cramped when busy, but during quiet times it is very comfortable.
Water QualityHot Spring Water
Capacity2people
A luxurious cold plunge bath fed directly by the source of a natural alkaline simple sulfur cold mineral spring. It is slightly cloudy and, like the onsen, is characterized by an exceptionally silky and slippery texture. The water temperature is mild, and wrapped in the scent of sulfur and a smooth skin feel, you may want to stay in it forever.
Closed Days: None
4-1-3 Aoshima, Miyazaki City, Miyazaki Prefecture 889-2162, Japan
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