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Hot Springs

Pride and passion for carbonated springs

Kosaka Carbonated Springs - The Value of Highly Concentrated Carbonated Springs "Medical Springs"
Kosaka's carbonated springs boast a high concentration of over 1,000 ppm, making them a valuable spring quality recognized as a therapeutic spring.
However, the source temperature is a cold mineral spring at 12.2℃.
Throughout its long history, it has never been possible to create carbonated bubbles that adhere to the skin while bathing.

We are now the fourth generation of our family and have been working on the issues of cold springs and carbon dioxide for over a decade.
We have finally established a unique technology that allows us to heat water while leaving the carbon dioxide in it.

This is how the carbonated Sengakukan was reborn.
Our desire is to deliver something better, something real, something meaningful.

Please enjoy a new carbonated spring experience that combines history and innovation.
  • Carbonated spring

    ~Warm water, but Yuzame Senyoi~
    As the old saying goes, carbonated springs have the effect of promoting blood flow.
    It is said that the perceived temperature is 2°C higher.

    It may feel lukewarm at first, but it will be fine for about 10 to 15 minutes. 
    By taking a long, steady bath, blood flow increases and your body gradually warms up from the inside.

    The balance of the autonomic nervous system is improved, and the parasympathetic nervous system becomes dominant.
    It is said to improve the quality of sleep and also reduce stress.

    Promotes blood circulation, improves metabolism, relieves fatigue, improves skin condition, etc.
    It is expected to have many positive effects on the body.

    Here is the explanation for bathing (You can also drink it.)

    Hot spring bath hours
    15:00 to 10:00 the next day
    Hot spring qualities
    Simple carbon dioxide cold spring
    Efficacy
    Indications:Chronic pain or stiffness in muscles or joints (rheumatoid arthritis, osteoarthritis, lower back pain, neuralgia, frozen shoulder, bruises, etc.), muscle stiffness due to motor paralysis, decreased gastrointestinal function, mild hypertension, diabetes, mild hypercholesterolemia, hemorrhoid pain, various symptoms due to stress, etc.
    Cautions
    Contraindications:In cases of active illness (especially when there is a fever), active tuberculosis, advanced malignant tumors, or severe anemia, etc., which cause severe physical weakness
  • Private Open Air Bath

    The hot springs surrounded by nature are the best luxury.
    It is a private open-air bath exclusively for staying guests, so you can relax and relax with your loved ones.
    At night, you can enjoy the Hoshimi open-air bath with candlelight and the moon-viewing open-air bath with moonlight.
    While watching the chirping of birds, the open-air bath wet with morning dew, and the snowflakes that pile up gently in winter.
    All are recommended.
    Two people can relax and enter as many times as they like for free.
  • Drinking fountain

    The carbonated spring water is a "drinkable spring water" approved by the health center.
    It has been said since ancient times that carbonated springs are better than stomach medicine.
    This shows that carbonated springs have been popular as an anti-inflammatory since the days when the efficacy of the springs was uncertain.

    The carbonated springs in this area come from different wells at each lodge, and each has different ingredients, salt content, and iron content.
    Therefore, some sakes are more suitable for drinking and other cooking purposes than others, which I think makes them unique and interesting.

    The source of this facility is the only one in the area.
    You can enjoy hot spring cocktails and highballs, and you can also make coffee.
    The inn also offers a variety of drinking spring experiences.
    Hot spring qualities
    Simple carbon dioxide cold spring Hypotonic - Weakly acidic - Cold spring
    Characteristics
    Indications for drinking:Gastrointestinal dysfunction
    Contraindications for drinking:N/A

Hot spring information list

Simple carbon dioxide cold spring

It can be used for bathing and drinking,
The appeal of this facility's hot spring is that you can enjoy different effects even though it is the same hot spring source.

Since the water is also drinkable, you can enjoy meals and drinks made with carbonated spring water.
In addition to containing carbon dioxide, there are also meals that focus on the minerals (ingredients) of hot springs.
You can experience the profound depth of carbonated spring water.

Private Open Air Bath

Reservations are made at check-in.

All guest rooms are equipped with hot springs where you can enjoy natural carbonated springs.

・In addition to the hot springs in your room, you can also use the private open-air baths free of charge.

The ideal temperature for carbonated springs is said to be 36℃ to 38℃, which is close to the temperature of human skin.
All rooms are equipped with natural carbonated hot springs so that you can enjoy the warm waters to your heart's content.
Feel the sound of the clear river and enjoy a carbonated hot bath.

Bath usage conditions

The private open-air bath is available free of charge.

Hot spring tax

Hot spring tax:Adults will be charged 150 yen separately.