Reach totonou with a 24-hour, authentic sauna where self löyly is possible
Hokkaido Asahikawa City
"SPA & SAUNA Osper" is a 24-hour spa and sauna facility in Asahikawa, Hokkaido. Thanks to its 2023 renovation, guests can now enjoy two types of saunas: a Finnish-style sauna that allows self löyly, and a powerful far-infrared sauna. The cold plunge baths come in two temperatures, and the semi-open-air cold plunge bath, which uses groundwater, offers a superb cool-down experience that lets you feel the crisp water quality of Asahikawa on your skin. There is also an outdoor relaxation space, so you can enjoy deep relaxation even in the middle of the city. Overnight stays are available, making it a paradise for sauna lovers.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity10people
A dry sauna that warms your body slowly and deeply from the core through far-infrared effects. Powerful heat fills the room and promotes a pleasant sweat. Its spacious interior is perfect for relaxing while watching TV.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity4people
A full-fledged Finnish-style sauna where self löyly is possible. By pouring water over the sauna stones, pleasant steam and heat fill the room, allowing you to adjust the perceived temperature freely. Wrapped in the warmth of wood, you can savor your own private sauna time in a quiet space.
Water QualityTap Water
Capacity2people
Water temperature is around 8 degrees in winter and around 15 degrees in summer. The sharply cold water instantly tightens your body after a sauna. Though compact, it delivers a deep refresh. Another appeal is that the experience changes with the seasons.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity2people
A semi-open-air cold plunge bath that uses groundwater. The crisp water quality of Asahikawa feels gentle on the skin and provides a pleasantly cooling experience. Cooling down while feeling the open air is exceptional, leading you into a deep state of totonou.
24 Hours
Closed Days: Unknown
〒070-0030 16-3-1 Miyashitadori, Asahikawa, Hokkaido
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
Reach totonou with a 24-hour, authentic sauna where self löyly is possible
Hokkaido Asahikawa City
"SPA & SAUNA Osper" is a 24-hour spa and sauna facility in Asahikawa, Hokkaido. Thanks to its 2023 renovation, guests can now enjoy two types of saunas: a Finnish-style sauna that allows self löyly, and a powerful far-infrared sauna. The cold plunge baths come in two temperatures, and the semi-open-air cold plunge bath, which uses groundwater, offers a superb cool-down experience that lets you feel the crisp water quality of Asahikawa on your skin. There is also an outdoor relaxation space, so you can enjoy deep relaxation even in the middle of the city. Overnight stays are available, making it a paradise for sauna lovers.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity10people
A dry sauna that warms your body slowly and deeply from the core through far-infrared effects. Powerful heat fills the room and promotes a pleasant sweat. Its spacious interior is perfect for relaxing while watching TV.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity4people
A full-fledged Finnish-style sauna where self löyly is possible. By pouring water over the sauna stones, pleasant steam and heat fill the room, allowing you to adjust the perceived temperature freely. Wrapped in the warmth of wood, you can savor your own private sauna time in a quiet space.
Water QualityTap Water
Capacity2people
Water temperature is around 8 degrees in winter and around 15 degrees in summer. The sharply cold water instantly tightens your body after a sauna. Though compact, it delivers a deep refresh. Another appeal is that the experience changes with the seasons.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity2people
A semi-open-air cold plunge bath that uses groundwater. The crisp water quality of Asahikawa feels gentle on the skin and provides a pleasantly cooling experience. Cooling down while feeling the open air is exceptional, leading you into a deep state of totonou.
24 Hours
Closed Days: Unknown
〒070-0030 16-3-1 Miyashitadori, Asahikawa, Hokkaido
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