Relax while enjoying forest bathing, with an extremely cold cold plunge bath fed by continuously flowing groundwater and a high-temperature sauna
Hokkaido Fukagawa City
"Fukagawa Onsen Irum no Yu Agri Kobo Maabu" is a complex facility located on Irumu Hill in Fukagawa City, Hokkaido, where you can enjoy both farm experiences and hot springs. In the large bath area, you can enjoy the skin-friendly, mildly alkaline "Irum no Yu". The sauna is characterized by powerful heat maintained at around 100°C, allowing you to enjoy a deep sweat in a quiet environment surrounded by Fukagawa's rich natural landscape. The biggest attraction is the cold plunge bath with continuously flowing groundwater, offering an extremely cold experience year-round at around single digits to about 10°C. After the sauna, the outdoor air bath lets you gaze out at the forest spread before you and sink into blissful relaxation.
TypeNatural Hot Spring
A natural hot spring using a hypotonic, mildly alkaline cold mineral spring. It is gentle on the skin and is known as a beauty bath that can be enjoyed safely by everyone from children to the elderly. The outdoor baths include an iwaburo and a tsubo-buro, allowing you to relax while gazing at the forest of Fukagawa spread out before you. The synergy of forest bathing and hot springs helps soothe everyday fatigue deep in your body.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity10people
A dry sauna maintained at around 100°C, with the appeal of powerful heat. The room is filled with the scent of wood and is spacious enough for about 10 people to relax comfortably, encouraging a solid sweat. You can unwind while watching TV, and through the windows you can faintly see the scenery outside, creating a sauna experience without any sense of confinement. In the quiet, forest-surrounded setting, you can fully enjoy your own private sauna time.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity2people
A cold plunge bath using groundwater. Although the temperature varies by season, it is characterized by very low water temperatures that instantly and powerfully tighten your body after the sauna. The smooth, gentle feel unique to groundwater is part of its charm, letting you enjoy comfort even in the cold.
Closed Days: None
074-1273 Hokkaido, Fukagawa City, Otoe-cho Otoe 600
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 while enjoying forest bathing, with an extremely cold cold plunge bath fed by continuously flowing groundwater and a high-temperature sauna
Hokkaido Fukagawa City
"Fukagawa Onsen Irum no Yu Agri Kobo Maabu" is a complex facility located on Irumu Hill in Fukagawa City, Hokkaido, where you can enjoy both farm experiences and hot springs. In the large bath area, you can enjoy the skin-friendly, mildly alkaline "Irum no Yu". The sauna is characterized by powerful heat maintained at around 100°C, allowing you to enjoy a deep sweat in a quiet environment surrounded by Fukagawa's rich natural landscape. The biggest attraction is the cold plunge bath with continuously flowing groundwater, offering an extremely cold experience year-round at around single digits to about 10°C. After the sauna, the outdoor air bath lets you gaze out at the forest spread before you and sink into blissful relaxation.
TypeNatural Hot Spring
A natural hot spring using a hypotonic, mildly alkaline cold mineral spring. It is gentle on the skin and is known as a beauty bath that can be enjoyed safely by everyone from children to the elderly. The outdoor baths include an iwaburo and a tsubo-buro, allowing you to relax while gazing at the forest of Fukagawa spread out before you. The synergy of forest bathing and hot springs helps soothe everyday fatigue deep in your body.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity10people
A dry sauna maintained at around 100°C, with the appeal of powerful heat. The room is filled with the scent of wood and is spacious enough for about 10 people to relax comfortably, encouraging a solid sweat. You can unwind while watching TV, and through the windows you can faintly see the scenery outside, creating a sauna experience without any sense of confinement. In the quiet, forest-surrounded setting, you can fully enjoy your own private sauna time.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity2people
A cold plunge bath using groundwater. Although the temperature varies by season, it is characterized by very low water temperatures that instantly and powerfully tighten your body after the sauna. The smooth, gentle feel unique to groundwater is part of its charm, letting you enjoy comfort even in the cold.
Closed Days: None
074-1273 Hokkaido, Fukagawa City, Otoe-cho Otoe 600
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