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Kusatsu Hotel Annex Watanoyu
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Hot Springs

What is the Watanoyu Kusatsu Onsen flowing from Kusatsu Onsen

Kusatsu Onsen has a source hot spring called "Wata(Wata-no-yu)".
The hot water is a soft and gentle hot water that is dyed in milky white like cotton.
When wrapped in the "Watanoyu", the body and mind are warmed to the core and healed.
The name of the inn, "Watanoyu," was named by Tsurutaro Kataoka.

Free flowing Hot Springs directly from the source

You can enjoy "Wata-no-yu" and "Wata-no-yu Bandaiko", two types of hot water flowing from the source.
"Wata-no-yu" is a soft and gentle hot water around."Bandai Bandaiko" is a hot, hard water with abundant hot water.
The sauna is a Finnish-style self-louver sauna.A cold bath is also available.

There are only a few inns that draw from the source "Watanoyu," making this a rare hot spring.

  • Men's bath

    Men's large bath

  • Women's bath

    Renovated in 2023 Women's large bath

  • Watanoyu

    【Hot spring name,Source name and Yu origin】
    Hot spring name:Kusatsu Onsen
    Source name:Wata-no-yu
    Yu origin:Kusatsu, Kusatsu Town, Agatsuma County, Gunma Prefecture

    【Investigation and test results at Yu-Yu】
    Survey and tester:Gunma Prefecture Hygiene Pollution Institute
    Survey and test date:June 25, 1991
    Spring temperature:56.0 degrees(Temperature 22.0 degrees at the time of the survey)
    Output:Without measuring(Natural spring)
    Perceptual testing:This water is colorless and transparent with a smell of hydrogen sulfide
    pH value:2.05
    Hot spring qualities
    		Acid / sulfur-containing-aluminum-sulfate / chloride hot spring(Hydrogen sulfide type)(Acidic hypotonic hot spring)
    Cautions
    		Some excerpts from the certificate of hot spring analysis by the Gunma Prefecture Hygiene Pollution Institute of Gunma Prefecture Hygiene Pollution Institute are introduced.

  • Bandaiko(Let's go)

    【Hot spring name,Source name and Yu origin】
    Hot spring name:Kusatsu Onsen
    Source name:Bandaiko
    Yu origin:Kusatsu, Kusatsu Town, Agatsuma County, Gunma Prefecture

    【Investigation and test results at Yu-Yu】
    Survey and tester:Incorporated Association Gunma Pharmaceutical Association(Environmental Health Testing Center)
    Survey and test date:June 10, 2003
    Spring temperature:96.0 degrees(Temperature at the time of the survey 13.5 degrees)
    Output:Without measuring(Excavation)
    Perceptual testing:Colorless and transparent
    pH value:1.5
    Hot spring qualities
    		Acid-chloride / sulfate hot spring(Acidic hypotonic hot spring)
    Cautions
    		Some excerpts from the certificate of hot spring analysis by the Incorporated Association Gunma Pharmaceutical Association have been introduced.

  • Footbath

Hot Springs

Kusatsu Onsen (100% natural hot spring)*Not including artificial hot spring

Open Hours

Large Communal Bath:You can use it all night, from 14 pm to 10 am the next morning.
Footbath:　It is available from 14:00 to 22:00 and from 7:00 to 10:00 the next morning.

Number of baths

［Open-air bath]Man:0 Woman:0 Mixed bath:0
［Indoor bath]Man:One woman:1 mixed bath:0
［sauna]Man:One woman:1 mixed bath:0

Other bath facilities

Sauna(man/woman)

Hot spring tax

Hot spring tax 150 yen for adult separately.