A premium spa resort evolving with a barrel sauna and auto löyly
Hokkaido Iwamizawa City
"Iwamizawa Onsen Honoka" is a spa resort that reopened in 2023 and boasts state-of-the-art sauna facilities. In its spacious sauna room, you can enjoy powerful auto löyly, and the open-air area is equipped with a barrel sauna that allows self löyly. The cold plunge baths also include tubs with different temperatures in the indoor and open-air areas, allowing for a carefully planned hot-and-cold contrast bath experience. The spring water is a rich sodium iodide chloride strong salt spring, and its onsen quality is truly top class. With free bedrock baths and well-equipped rest areas as well, it is a paradise for sauna enthusiasts, where you can pursue totonou and relaxation all day long.
TypeNatural Hot Spring
A free-flowing sodium iodide chloride strong salt spring. It is extremely rich in salt, and is excellent for its antibacterial and heat-retaining effects. The amber-colored water has a bold texture on the skin, letting you feel the powerful nature of the onsen itself.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity40people
One of the largest sauna rooms in Hokkaido, accommodating more than 40 people. Powerful convection stove-based auto löyly is performed regularly, letting you enjoy a wave of heat as steam spreads at once. The spacious stepped seating also lets you choose your preferred temperature zone.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity8people
A barrel-shaped sauna installed in the open-air area, designed in an authentic Nordic style. Self löyly is available, so you can adjust the humidity and temperature at your own pace. The warmth of the wood and the sauna experience with the outdoor air is exceptional.
Sauna TypeSteam Sauna
Capacity10people
A mist sauna wrapped in pleasant steam. By applying the provided salt to your skin, you can expect a detox effect that helps leave your skin smoother while you sweat. With its mild temperature, it is a space where you can relax slowly.
Water QualityTap Water
Capacity8people
A spacious cold plunge bath in the indoor bathing area. The flow from the sauna room is good, so you can cool your body thoroughly. With a stable temperature setting, it is easy to use for everyone from beginners to advanced sauna users.
Water QualityTap Water
Capacity2people
A single-person bucket-style cold bath in the open-air area. Set at a lower temperature than the indoor bath, it delivers an intense refreshing sensation, amplified by the cold outdoor air. It is ideal for cooling down after the barrel sauna.
Closed Days: Open all year
〒069-0362 1196-2 Kamihoromui Minami 1-jo 1-chome, Iwamizawa, 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
A premium spa resort evolving with a barrel sauna and auto löyly
Hokkaido Iwamizawa City
"Iwamizawa Onsen Honoka" is a spa resort that reopened in 2023 and boasts state-of-the-art sauna facilities. In its spacious sauna room, you can enjoy powerful auto löyly, and the open-air area is equipped with a barrel sauna that allows self löyly. The cold plunge baths also include tubs with different temperatures in the indoor and open-air areas, allowing for a carefully planned hot-and-cold contrast bath experience. The spring water is a rich sodium iodide chloride strong salt spring, and its onsen quality is truly top class. With free bedrock baths and well-equipped rest areas as well, it is a paradise for sauna enthusiasts, where you can pursue totonou and relaxation all day long.
TypeNatural Hot Spring
A free-flowing sodium iodide chloride strong salt spring. It is extremely rich in salt, and is excellent for its antibacterial and heat-retaining effects. The amber-colored water has a bold texture on the skin, letting you feel the powerful nature of the onsen itself.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity40people
One of the largest sauna rooms in Hokkaido, accommodating more than 40 people. Powerful convection stove-based auto löyly is performed regularly, letting you enjoy a wave of heat as steam spreads at once. The spacious stepped seating also lets you choose your preferred temperature zone.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity8people
A barrel-shaped sauna installed in the open-air area, designed in an authentic Nordic style. Self löyly is available, so you can adjust the humidity and temperature at your own pace. The warmth of the wood and the sauna experience with the outdoor air is exceptional.
Sauna TypeSteam Sauna
Capacity10people
A mist sauna wrapped in pleasant steam. By applying the provided salt to your skin, you can expect a detox effect that helps leave your skin smoother while you sweat. With its mild temperature, it is a space where you can relax slowly.
Water QualityTap Water
Capacity8people
A spacious cold plunge bath in the indoor bathing area. The flow from the sauna room is good, so you can cool your body thoroughly. With a stable temperature setting, it is easy to use for everyone from beginners to advanced sauna users.
Water QualityTap Water
Capacity2people
A single-person bucket-style cold bath in the open-air area. Set at a lower temperature than the indoor bath, it delivers an intense refreshing sensation, amplified by the cold outdoor air. It is ideal for cooling down after the barrel sauna.
Closed Days: Open all year
〒069-0362 1196-2 Kamihoromui Minami 1-jo 1-chome, Iwamizawa, 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