Relax with the miraculous water, a skin-beautifying bath, and a cold mineral bath filled directly from the source
Hokkaido Numata Town
"Horoshin Onsen Hotaru-kan Heike no Yado" is a quiet hot spring inn surrounded by the rich natural beauty of Numata Town, Hokkaido. Its baths draw from a pristine spring once called "miraculous water," and are known for their gentle texture and a faint sulfur aroma that warms you from the inside out. In the sauna area, you can enjoy a dry sauna with a relatively low temperature setting that is beginner-friendly yet still maintains good humidity. A highlight is the cold mineral bath filled with spring water used exactly as it is. With its soft feel against the skin, it elevates alternating hot and cold bathing into a more luxurious experience. At night, you can gaze up at a sky full of stars, and in summer, bathing in the open-air bath while watching fireflies dance outdoors offers a truly exceptional sense of freedom.
TypeNatural Hot Spring
A natural hot spring from a simple sulfur cold mineral spring with a faint sulfur aroma. Known as a skin-beautifying bath that leaves the skin feeling smooth, it is also characterized by warmth that lingers long after bathing. You can relax and enjoy the blessings of the source while looking out at the scenery through the large windows of the main bath.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A gently set dry sauna that even beginners can enjoy comfortably. The room is clean and maintains a moderate level of humidity, so it is easy to breathe and you can work up a good sweat at a relaxed pace. Its appeal lies in the quiet time you can spend surrounded by the warmth of wood.
Water QualityHot Spring Water
Capacity3people
A luxurious source-water cold bath using cold mineral spring water that bubbles up from underground exactly as it is. It features a soft, gentle feel that is different from tap water. The crisp, chilled mineral water pleasantly tightens the body after sauna heat and provides an exceptional sense of refreshment. You can also drink it, allowing you to experience the power of this pure water.
Closed Days: None
377 Horoshin, Numata Town, Uryu District, Hokkaido 078-2225
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
Relax with the miraculous water, a skin-beautifying bath, and a cold mineral bath filled directly from the source
Hokkaido Numata Town
"Horoshin Onsen Hotaru-kan Heike no Yado" is a quiet hot spring inn surrounded by the rich natural beauty of Numata Town, Hokkaido. Its baths draw from a pristine spring once called "miraculous water," and are known for their gentle texture and a faint sulfur aroma that warms you from the inside out. In the sauna area, you can enjoy a dry sauna with a relatively low temperature setting that is beginner-friendly yet still maintains good humidity. A highlight is the cold mineral bath filled with spring water used exactly as it is. With its soft feel against the skin, it elevates alternating hot and cold bathing into a more luxurious experience. At night, you can gaze up at a sky full of stars, and in summer, bathing in the open-air bath while watching fireflies dance outdoors offers a truly exceptional sense of freedom.
TypeNatural Hot Spring
A natural hot spring from a simple sulfur cold mineral spring with a faint sulfur aroma. Known as a skin-beautifying bath that leaves the skin feeling smooth, it is also characterized by warmth that lingers long after bathing. You can relax and enjoy the blessings of the source while looking out at the scenery through the large windows of the main bath.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A gently set dry sauna that even beginners can enjoy comfortably. The room is clean and maintains a moderate level of humidity, so it is easy to breathe and you can work up a good sweat at a relaxed pace. Its appeal lies in the quiet time you can spend surrounded by the warmth of wood.
Water QualityHot Spring Water
Capacity3people
A luxurious source-water cold bath using cold mineral spring water that bubbles up from underground exactly as it is. It features a soft, gentle feel that is different from tap water. The crisp, chilled mineral water pleasantly tightens the body after sauna heat and provides an exceptional sense of refreshment. You can also drink it, allowing you to experience the power of this pure water.
Closed Days: None
377 Horoshin, Numata Town, Uryu District, Hokkaido 078-2225
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