Private Early Morning Onsen Plan（AM7:30toAM9:30）

Please read the following information carefully before making your reservation.

Enjoy a unique hot spring experience featuring an open-air bath surrounded by pristine forest, where you can experience both forest bathing and an authentic natural hot spring at the same time.

For a limited time, until overnight stays resume, we are offering our hot spring as a private early morning onsen experience.

Relax in the healing waters of Kawayu Onsen while surrounded by magnificent nature. Create unforgettable memories with your family, loved ones, or close friends in the privacy of your own onsen.

View from the Open-Air Bath

Private Onsen (Exclusive Use)

Available Hours

7:30 AM – 9:30 AM

Please leave the bathing area by 9:30 AM, as our regular day-use hot spring opens at 10:00 AM.

Private Onsen Fee

Base Fee: ¥3,000 per reservation

If the total day-use admission fee for your group exceeds ¥3,000, the difference must be paid in cash at the front desk upon arrival.

Day-Use Admission Fees

• Adults (High School Students & Older): ¥1,000

• Children (Elementary & Junior High School Students): ¥500

• Preschool Children: Free

Payment

• Official Website Reservations: Credit card payment only

• Additional charges at the hotel: Cash only

Amenities

The following amenities are provided in the public bath:

• Shampoo

• Conditioner

• Body Wash

• Facial Lotion

• Hair Dryer

• Cotton Swabs

• Tissue Paper

Drinking Water

A complimentary water dispenser and vending machines are available in the hallway outside the entrance to the public bath.

Teshikaga's drinking water, including tap water, comes from the underground spring water of Lake Mashu, renowned for its exceptional purity.

Available at the Front Desk

Rental

• Bath Towel & Face Towel Set: ¥300 (tax included)

For Purchase

• Original Onsen Face Towel: ¥500 (tax included)

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Before Entering the Bath

• Please rinse yourself thoroughly and wash your body before entering the hot spring.

• If you have open wounds, skin inflammation, or sensitive skin, please be aware that the highly acidic hot spring water may cause irritation.

• Pregnant guests, elderly guests, and young children should refrain from bathing if they are feeling unwell or have any health concerns.

While Bathing

• Guests who have consumed alcohol are not permitted to use the hot spring.
  Bathing after drinking significantly increases the risk of falls, fainting, and heart-related incidents.

• Please do not place towels in the bath water.

• The use of mobile phones, cameras, or any photography is strictly prohibited in the bathing area, including the changing room, to protect guests' privacy.

• The area immediately beyond the open-air bath is part of a protected national forest. Please do not leave the bathing area or cross beyond the designated boundaries.

• For hygiene and water quality reasons, guests who are unable to independently control bowel or bladder functions are kindly asked not to use the hot spring.

Additional Information

• Please remove all jewelry and metal items, including rings, watches, and eyeglasses, before bathing. The highly acidic water may cause discoloration or corrosion.

• We recommend limiting each bath to 10–15 minutes to avoid excessive exposure.

• After bathing, hot spring minerals will remain on your skin. If preferred, you may rinse off with a shower and apply moisturizer afterward to help prevent dryness.

• Please use the valuables lockers provided for your personal belongings.
  We cannot accept responsibility for lost or stolen items.

• The floors may become slippery due to natural hot spring minerals.
  Please walk carefully and use the handrails where available.

• The ¥90 bathing tax is included in your payment.
  As it is not shown separately on the standard receipt, please ask the front desk if you require a receipt showing the bathing tax breakdown.

Your Cooperation Is Appreciated

To ensure a safe and pleasant experience for all guests, we kindly ask for your understanding and cooperation with the above guidelines.

Guests who do not follow these rules or staff instructions may be asked to leave the facility.

About the Water of Kawayu Onsen

Kawayu Onsen is famous for its highly acidic natural hot spring water.

There is even a local saying that "a five-inch iron nail will dissolve in just one week." While this is a traditional expression emphasizing the strength of the water, it reflects the remarkable acidity of the spring.

Because of this unique mineral composition, corrosion of metal fixtures throughout the bathhouse is unavoidable and should be considered a natural characteristic of Kawayu Onsen.

The acidic environment also shortens the lifespan of electrical appliances, and occasionally equipment or amenities may malfunction unexpectedly. We appreciate your understanding.

About Insects

Our open-air bath overlooks a beautiful protected national forest, one of the unique attractions of our hot spring.

Because the bath is surrounded by nature, insects may occasionally enter the outdoor bath area, especially during warmer seasons.

Insect nets are provided beside the bath for your convenience should you wish to remove any insects from the water.

If you are uncomfortable around insects, please be aware that using the outdoor bath may not always be suitable depending on natural conditions.

We appreciate your understanding and hope you enjoy the unique experience of bathing in the heart of nature.