Onsen Facilities by Theme | By Hot Spring Benefits

With its nostalgic Showa-era retro atmosphere, Ganso Motoyu feels like a step back in time. There is one small bath for men and one for women, each generously supplied with free-flowing hot spring water straight from a high-temperature source of 49°C.
The warmth lingers long after bathing, allowing you to truly feel the benefits of the spring on your skin. Drinking the spring water (insen) is also possible here, so you can savor its qualities from the inside out as well.

This drop-in bathing facility in Ongacho is known for its rare tea-brown, cloudy hot spring water. The greatest highlight is its extremely high mineral content: the level of dissolved substances reaches around 9,000 mg—far exceeding the national standard of 1,000 mg used as a benchmark for therapeutic hot springs.
The rich concentration of minerals gradually soaks deep into the body, soothing away everyday fatigue and leaving you feeling fully refreshed.

Founded in 1860, Hakatayu’s charming three-story wooden building creates a wonderfully nostalgic, non-everyday atmosphere. Its hot spring water is pumped from 260 meters underground and flows directly into the bath without being exposed to air along the way.
Because the spring contains abundant radon, it has long been valued by local residents, with benefits traditionally associated with chronic skin conditions. It remains a beloved bathhouse where people return time and time again.
 

Created as a community hub with the goal of building a city where people can live in good health and with peace of mind, this facility carries the wish of “lighting up tomorrow” in its name.
The smooth, rich spring water rises from 1,500 meters underground and is generously supplied to spacious baths in a continuous flow. For those who prefer a more private experience, reservable private baths are also recommended.

This hot spring has an impressive pH level of 9.5, giving it a thick, silky texture that feels almost like soapy water. Simply soaking is said to leave your skin hydrated, soft, and smooth.
In the continuously flowing baths, you may even see yunohana (natural mineral deposits) drifting through the water. Its exceptional quality draws hot spring fans not only from within the prefecture, but from far beyond as well.
 

A hidden gem surrounded by peaceful countryside scenery, Aoki Onsen is a quiet retreat known to those in the know. The spring water emerges at 65°C and is adjusted to a comfortable temperature through a heat exchanger, then offered luxuriously as free-flowing water.
Its distinctive, slightly slippery texture is highly praised, with many guests saying they can truly feel the beauty-skin effect after bathing. The clean and welcoming atmosphere is another reason so many visitors return again and again.

A hot spring inn nestled halfway up sacred Mt. Hikosan, one of Japan’s three major Shugendo mountains. Surrounded by the stillness of deep forest beyond the windows, you can fully relax in gentle, soothing waters.
Often referred to as a “beauty bath,” the hot spring is said to work almost like soap, softly removing unwanted dead skin and impurities from pores. After bathing, you may be surprised by how smooth your skin feels. Why not refresh yourself with a peaceful escape to this mountain retreat?
 

Just a two-minute walk from Amagi Station, this hotel offers an incredibly convenient location. A faint sulfur aroma adds a classic onsen atmosphere the moment you arrive.
With a remarkable pH level of 9.98, the hot spring water has a silky thickness that gently wraps your skin like a veil. Many visitors say the moisturizing sensation lasts even after bathing. If you’d like to enjoy the hot spring in a private setting, the facility’s 11 reservable private baths—each with its own unique style—are highly recommended.

A day-use hot spring where you can enjoy 100% natural “moor spring” water (plant-based hot spring water), a rare type found even across Japan.
What makes it especially memorable is the amber-colored glow of the water and its smooth texture, leaving your skin feeling deeply moisturized. Surrender yourself to this one-of-a-kind spring infused with the energy of nature, and enjoy a truly relaxing moment.