Accomodation reservations
Day-use reservations


Experience the wonderful open-air baths

otel Iya Onsen, a cable car will take guests to the rotenburo (open-air bath) at the bottom of the valley. The degree of decline is 42 degress and it takes about five minutes to descend the 170 meters. Along the way one can enjoy a panoramic view of the valley.

The open-air baths, one for men and one for women, have been constructed as to protrude along the the Iya river. They flow with an abundance of hot spring water and although the white mineral deposits that float in the bath make the water cloudy, this shows that the water is coming from the source of the spring.

Open-air bath "Seseragi-no-yu" and "Keikoku-no-yu"
will be altered for men and women every day.


These spacious baths along the ridge of the Iya river are filled naturally from underground hot spring water of about 38 degrees Celsius.
So far, Seseragi-no-yu was for women and Keikoku-no-yu was for men.
As from 29th July 2016, Open-air bath Seseragi-no-yu and Keikoku-no-yu will be altered for men and women every day.
For the overnight guests, please enjoy distinctive views in the morning and the evening. While you are taking a bath.
*The bath will be altered every day. Those who are not staying overnight cannot use the both bath. Please be advised.

Private open-air bath


Beside the open-air bath for men and women, there is an open-air bath that you can reserve for a fee.
Here you can relax even more knowing that other people will not disturb you.
Please inquire at the front desk (0883-75-2331) or Email (

Large bath


The large bath is open 24 hours a day except for 1 hour between 10:30 AM and 11:30 AM when it is closed for cleaning.
One for men and one for women.


Day guests 7:00 - 18:00 (admission allowed until 17:00)
Overnight guests 7:00 - 21:00 (Note: from Jan 4 until the end of Feb - until 19:00)

Price for open-air bath

Price for open-air bath adults 1700yen; children 900yen
large bath adults 600yen; children 300yen
note There is one open-air bath for men and one for women.
You cannot have a bath with clothes or a bathing suit on.
You cannot wash your body in the bath.

Spa treatment

Spa treatment

Other than the hot springs at Iya Onsen, we also offer “Keiraku (Meridian) Treatment” that guarantees a higher degree of relaxation. By encouraging blood flow from the depths of your body, your body temperature will increase and possible swelling will decrease. Even after one treatment you will feel the postive effects.

- Notice -
As of August 1,2017 , we will no longer offer meridian treatment

+81 883-75-2311

Internet reservations
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