About onsens

About onsens

Rare guest room Kuroyu (black water) onsen in Japan

Chiba Prefecture is one of the Kanto region’s leading onsen areas, known to those in the know.
At Itsukiri, we prepare fulfilling onsen equipment for you to enjoy our Boso’s natural onsen.
It is also designed to ensure that you can enjoy our facility as a Japanese onsen inn.

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【Guest room onsen】
At the Premium Suite and Private Villa, you can enjoy a private natural onsen at each building.
Please fully enjoy the natural onsen with a lot of benefits and effects and relax any time and as many times as you like.

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itsukiri_spa
itsukiri_spa07
itsukiri_spa04
itsukiri_spa05
itsukiri_spa03
itsukiri_spa06
juice
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【Large public bath】

We have a large public bath on the second floor of the building. Men’s and women’s baths are separate and spacious, and they are equipped with indoor baths, open-air baths, saunas, and cold baths. It is designed to fully satisfy even onsen lovers and sauna lovers.

Onsen
Source Minamiboso Isumi Itsukiri Onsen (Old)
Quality Sodium - Hydrogen Carbonate Springs Temperature: 16.8℃ PH:8.56 Effects: Chronic muscle or joint pain or stiffness, muscle stiffness by motor impairment, decline in digestive functions, mild hypercholesterolemia, mild asthma or emphysema, pain from hemorrhoids, autonomic nervous instability, stress-related symptoms, recovery period after an illness, fatigue recovery and health promotion.
Source Minamiboso Isumi Itsukiri Onsen (New)
Quality Sodium - Hydrogen Carbonate Springs Temperature: 19.5℃ PH: 8.45 Effects: Chronic muscle or joint pain or stiffness, muscle stiffness by motor impairment, decline in digestive functions, mild hypercholesterolemia, mild asthma or emphysema, pain from hemorrhoids, autonomic nervous instability, stress-related symptoms, recovery period after an illness, fatigue recovery and health promotion.
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