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Furo information

The source of Shiriyaki Onsen

Abundant hot water that springs from the bottom of the river

The scenery of the four seasons with the trees of the mountains.
The murmuring of the river, the voice of insects, the chirping of birds and the buzz of trees.
The soundless sound, combined with the beauty of the valley that varies from season to season, heals the mind and body.
If you look at the stars in the sky, you will forget the passage of time and eventually become one with nature.
Please enjoy the soft water to your heart's content in the tranquility.
  • Abundant hot springs flowing from the source

    The source of Hoshigaoka Sanso is Shiriyaki Shiriyaki Onsen, which springs from the bottom of the Nagazasasawa River.
    The place where the Shiriyaki Shiriyaki Onsen springs up is a huge open-air bath made by blocking the Nagazasasawa River, and is called "Kawa-no-yu".
    The name of the hot spring is said to be "baked ass", that is, it is said that the hemorrhoids were healed by sitting on a stone warmed by the hot water that springs from the bottom of the river.
    Hot spring bath hours
    You can take a bath after check-in*Men and women are replaced from 21:00
    【Spring temperature】55 ℃

    【Hot Spring Qualities】calcium/sodium/Sulfate/Chloride hot spring

    【Indications】Hemorrhoids/Rheumatism/Skin disease/Gynecological illness/High blood pressure/Trauma
  • Open Air Bath

    An open-air bath along a mountain stream that is full of openness for both men and women.
    The expression changes with the seasons.
  • Indoor bath

    The indoor bath is a stone-paved bathtub.
    Thick beams on the high ceiling.
    Enjoy the view from the window and relax.
  • Family bath*Currently not available.

    *Due to the aging of the bath, the family bath is closed.
     We apologize for the inconvenience and thank you for your understanding.
  • One-day hot spring

    It is also possible to use only for bathing.
    【Regular holiday】Wednesday Thursday
    *Please check by phone before using as it may not be available on irregular days.

    【rental】Bath towel:300 JPY(Tax included)
    【sale】Face towel(Hoshigaoka Sanso logo embroidered):200 JPY(Tax included)
    Hot spring bath hours
    From 12:30 to 14:30(*Last reception time 13:45)
    Usage fee
    Adult(s):900 yen/Children:500 JPY(2 years old to elementary school students) (From July 17, 2022)

About hot springs

Hot Springs

Shiriyaki Onsen (100% natural hot spring)*Does not include artificial hot springs

Open Air Bath

Yes (both men and women (including time change), cannot be reserved)

Private Bath

Currently not available.

Number of baths

[Open-air bath]Man:1 woman:1 Mixed bathing:0
[Indoor bath]Man:1 woman:1 Mixed bathing:0
[Sauna]Man:0 woman:0 mixed bathing:0

Hot spring tax

Hot spring tax Adults 150 yen will be charged separately.

Bathhouse amenities

Body Soap/shampoo/rinse/Shower cap/Shaving/brush/Hairdryer/Cotton swab/Toner/Emulsion/Cleansing