Ryokan Shioyu Naginoto , Karatsu

Shioyu Large Open-Air Bath

The large Shioyu bath is an observatory itself, offering an unimpeded view of the whole of Karatsu Bay and the sensation of floating in the sea. We invite you to come and let your tiredness drift away as you gaze out over the purple-hued sea in the evening and take in the sound of the waves.

What is Shioyu?

Shioyu, as the kanji denote, is heated seawater.
The salt bath, a representative form of thalassotherapy (therapeutic use of seawater), is believed to be effective against various types of dermatitis and is sometimes called the "beauty bath." Enjoy the sunset as you soak in the Shioyu open-air bath.

Shioyu Large Open-Air Bath

Men 1 indoor bath, 1 large open-air bath
Women 1 indoor bath, 1 large open-air bath

Shioyu Family Bath

3 rooms in total


Daytrip guests: 10:00-22:00
Hotel guests: 6:00-24:00


Shampoo, rinse, body soap, bath towels (for a fee)
Men: Hair tonic, hair liquid, face lotion
Women: Liquid cleansing, cleansing wash, skin milk, face lotion


Shioyu Large Open-Air Bath

Adult ¥900
Child ¥500
Pre-school child Free

Shioyu Family Bath

One hour: ¥2,900(Weekday) ¥3,500(Weekend)
30 minutes extension: ¥900
*The baths are free for hotel guests.
*Face towels are included in the bath towel fee.