"Rosoku Onsen" is a secret hot spring known for its high concentration of radon, which is rare nationwide. It is characterized by gas bubbles rising from the water. It is said that inhaling this radon gas can have effects such as activating cells, improving immunity, and relieving pain, and many people come from far away to take a therapeutic bath.

The way to take a bath at Rosoku Onsen is to first wash your body, then soak in the radium bath of the No. 2 spring for about 3 to 5 minutes, and then soak in the radium bath of the No. 1 spring for about 3 to 5 minutes. After bathing for a total of about 10 minutes, take a break of about 1 to 1.5 hours, and repeat this process 2 to 3 times a day. 

The facility is surrounded by rich nature, and you can refresh your mind and body while enjoying the beautiful scenery of the four seasons.

It seems that the main purpose of the facility is to stay overnight, so the price is a bit high, but it can also be used as a day spa.

Day bathing is available until 3:00 p.m.

It is a hot spring that is popular among experts as a therapeutic bath. Highly recommended for radon hot spring lovers.

[Trivia]
The radon content of the Candle Hot Spring is very high, and you can check the value in the hot spring analysis report. It is said that this high-concentration radon spring can have a health-promoting effect called the hormesis effect by exposing the body to small amounts of radiation.

[Hidden gem]
There is a small walking path behind the hot spring facility. After bathing, it is good to move your body lightly in the clear air and feel the energy of nature.

[Useful concerns]
Because it is a high-concentration radon spring, bathing time is about 10 minutes, 2 to 3 times a day, and there is a warning not to endure and get in the hot water.
Please rest your body after bathing. (About 1 to 1.5 hours)