Five private hot spring sources Three of them are artesian springs.

Misasa Onsen is said to have the highest radium content in the world.
The sodium chloride spring contains weak radiation and is said to be effective not only for general indications but also for improving immunity.

Recently, by inhaling steam from hot springs,
A small amount of radon radiation
It was found that it activates cells.
This is called the hormesis effect.

Please take a dip in the hot water that gushes out naturally from the cracks in the rocks.

Five private hot spring sources Three of them are artesian springs.

Misasa Onsen is said to have the highest radium content in the world. The sodium chloride spring contains weak radiation and is said to be effective not only for general indications but also for improving immunity. Recently, by inhaling steam from hot springs, A small amount of radon radiation It was found that it activates cells. This is called the hormesis effect. Please take a dip in the hot water that gushes out naturally from the cracks in the rocks.

Gankutsu no Yu

Misasa Onsen's only thorium spring

At Gankutsu no Yu, hot springs naturally gush out from each of the three baths (lower bath and middle bath), and radium springs (lower bath and middle bath), and thorium springs (upper bath), which are unique to Misasa Onsen, are available. The thorium spring is so hot that it was awarded the title of having the highest concentration of thorium in the world in 1945.

Bathing hours

Men: 21:30~24:30 / 5:00~10:00

Women: 14:00~21:00

*Gankutsu no Yu is open for men and women at different times.

Originally, hot springs gushing out from the Mitokugawa River were used as bathtubs, with some deep and some shallow, “It’s just like a river!”
Famous item [Gankutsu no Yu] Free-flowing artesian spring.

Seseragi no Yu

open-air bath

Looking forward to it while soaking in the bathtub Mitokugawa River is rich in nature
An open-air bath where you can take a bath while listening to the sound of the Mitokugawa River.
Due to the effects of Typhoon No. 7 of 2020, the Seseragi no Yu open-air bath will be closed for the time being. You can use the cypress bath and indoor bath located at Seseragi no Yu. We apologize for any inconvenience this may cause. Thank you for your understanding.

Bathing hours

Men:14:00~21:00

Women:21:30~24:30 / 5:00~10:00

※Cleaning time is between 21:00 and 21:30.

*The open-air bath Seseragi-no-Yu is open to men and women at different times.

About spring quality and characteristics

Spring quality: Weakly radioactive spring – sodium – chloride spring
Efficacy: Neuralgia, muscle pain, joint pain, frozen shoulders, bruises, sprains, digestive disorders, hemorrhoids, sensitivity to cold, increased immunity, etc.

Reservations from the official website are advantageous.

Reserve