Kanto > Gunma > Tanigawa Onsen
A luxurious onsen ryokan with private open-air baths in every room, fed by free-flowing hot spring water
Bettei Senjuan
Address：614, Tanigawa, Minakami-machi, Tone-gun, Gunma 379-1619, JAPAN
TEL：+81-(0)278-20-4141
| Spring Quality | ||
| Calcium, Sodium － Sulfate / Chloride Springs | ||
| カルシウム・ナトリウムー硫酸塩・塩化物泉 | ||
| （Hypotonic, Weakly alkaline, Hot Spring） | ||
Abundant hot spring water with free-flowing hot spring! |
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Total Dissolved Substances
Hydrogen Ion Concentration
Spring Quality
Calcium, Sodium
－ Sulfate / Chloride Springs
（Hypotonic, Weakly alkaline, Hot Spring）
Total Dissolved Substances
Hydrogen Ion Concentration
pH8.4
（Weakly alkaline）
Hot springs are believed to originate from rain and snow seeping into the ground, or ancient seawater trapped deep within the earth. This water is heated by geothermal energy or magma, absorbing mineral components over a period of years—or even millennia—before finally emerging at the surface.
Gender-separated Large Public Indoor Bath “Ichi-no-Kura”
The public bath “Ichinokura” is paired with the open-air bath “Suzumushi-no-Yu”, and the men’s and women’s bathing areas switch by the hour. Its stone tub evokes the rugged power of nature. A highly efficient dry sauna with walls lined with bincho charcoal is also available.
Ideal for physical and mental rehabilitation!
Ideal for:
| People wanting firm, radiant skin | People seeking beautiful skin | People with dry skin |
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| People concerned about minor cuts | People sensitive to cold | People feeling stressed |
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Onsen Specs
Evidence of
“Hot springs for beautiful skin”
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Weakly alkaline
Exfoliating, smoothing and silky effects -
Sulfate springs
Anti-wrinkle and revitalizing effect -
Chloride springs
Skin coating and moisturizing effect -
Metaboric acid
Anti-acne and cleansing effect
Onsen power chart
Gender-separated Open-air Bath “Suzumushi-no-Yu”
With the Tanigawa River flowing below and lush greenery spreading out before you, the view from the bath soothes both body and soul. The bottom of the tub is lined with stones, offering a pleasantly stimulating sensation. If you listen closely, you can hear the chirping of wild birds, allowing you to enjoy a luxurious moment while soaking in fresh, free-flowing hot spring water.
Anti-aging hot spring: Promotes circulation, retains heat, provides bactericidal effects, and beautifies the skin.
Anti-aging hot spring: Promotes circulation, retains heat, provides bactericidal effects, and beautifies the skin.
Gender-separated Large Public Indoor Bath “Sennokura”
The public bath “Sennokura” is paired with the open-air bath “Hotaru-no-Yu”, and the men’s and women’s bathing areas switch by the hour. Its large cypress tub, finished with red lacquer, makes a striking impression. “Sennokura” also features a low-temperature mist sauna, which is especially recommended for women as it is gentle on the skin.
Spring Temperature
Color of water / Smell of water
Osmotic Pressure
“Osmotic pressure” classification in hot springs is a method of categorization based on the difference in concentration between the spring water's dissolved components and human bodily fluids.
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Hypotonic
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Isotonic |
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 | It has the same osmotic pressure as human bodily fluids. This is equivalent to a saline solution (salt water) made by dissolving 8.8 grams of table salt in 1 liter of water. |
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Hypertonic |
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 | The high osmotic pressure means your body moisture is easily released while the hot spring components are more readily absorbed into the body. Please be cautious of “Yu-atari” (hot spring fatigue). This is generally considered a “highly concentrated” hot spring. |
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Spring Temperature
Clear and Colorless / Smell of water
Clear and Colorless
Odorless
Osmotic Pressure
“Osmotic pressure” classification in hot springs is a method of categorization based on the difference in concentration between the spring water's dissolved components and human bodily fluids.
|
Hypotonic
|
|||
Isotonic |
|||
|---|---|---|---|
| It has the same osmotic pressure as human bodily fluids. This is equivalent to a saline solution (salt water) made by dissolving 8.8 grams of table salt in 1 liter of water. |
||
Hypertonic |
|||
 | The high osmotic pressure means your body moisture is easily released while the hot spring components are more readily absorbed into the body. Please be cautious of “Yu-atari” (hot spring fatigue). This is generally considered a “highly concentrated” hot spring. |
||
Gender-separated Open-air Bath “Hotaru-no-Yu”
It feels as though you are quietly bathing deep in the forest. A terrace is also available, where you can enjoy the pleasant breeze flowing through the Tanigawa Valley. Repeating the cycle of warming up in the hot spring and cooling down on the terrace—known as contrast water therapy—is said to be highly effective for relieving fatigue.
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Private hot spring sources
Free-flowing hot spring water made possible by owning three sources
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An abundant hot spring water
With more than enough hot spring water, you can always enjoy a fresh, continuously renewed bath
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Perfect for rehabilitation
Sulfate springs help prevent arteriosclerosis and have a blood-pressure-lowering effect, which is why they are known as “Hot springs for stroke prevention”
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Weakly alkaline（pH8.4）
By dissolving old keratin, it leaves your skin feeling smooth after the bath
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An “anti-aging” hot spring for beautiful skin
Calcium–sulfate springs (gypsum springs) stimulate skin elasticity and help prevent wrinkles
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Good for sensitivity to cold
Sulfate and chloride springs improve blood circulation and are effective for sensitivity to cold
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Hot springs for warmth
Chloride springs seal sweat glands with salt, helping to retain body heat and making them ideal for those sensitive to cold
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A skin-friendly spring quality
Sulfate and chloride springs are effective for cuts and dry skin
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For people with depression
Combined with the strong calming effects of calcium ions, it helps release both mind and body
Gender-separated Open-air Bath “Hotaru-no-Yu”
It feels as though you are quietly bathing deep in the forest. A terrace is also available, where you can enjoy the pleasant breeze flowing through the Tanigawa Valley. Repeating the cycle of warming up in the hot spring and cooling down on the terrace—known as contrast water therapy—is said to be highly effective for relieving fatigue.
| Water added No 〇 |
Water heated No △ |
Disinfected No 〇 |
Circulated No 〇 |
Bath additive No 〇 |
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|---|---|---|---|---|---|
| ※During the winter season, the water may be heated to maintain a suitable bathing temperature. | |||||
| Percentage of source | 100％ | ||||
Facility Data
| Founded in | 1997（Heisei 9） |
|---|---|
| Check in | 1:00 PM |
| Check out | 11:00 AM |
| Location | Mountain |
| Rooms | Total 18 rooms 15 Japanese-style rooms, 1 Japanese-Western room, and 2 Western-style rooms (all with bath and toilet) |
| Capacity | 50 people |
| Parking | 17 cars |
| Facilities | Bar, Spa, Shop, Garden, Reading room |
| Internet | Wi-Fi available |
| Barrier-free | Only one room supported |
| Bidet toilet | Equipped |
Keywords for this inn
| Scenic views of the iconic Mt. Tanigawa and a tranquil mountain environment |
| A luxury ryokan with open-air baths in every room |
| Finely crafted dishes made with the finest seasonal ingredients |
| A fusion of modern architecture and traditional craftsmanship |
| Guest rooms filled with elegance and complete comfort |
Transportation Access
| By train | About 10 minutes drive from Minakami Station on the Jōetsu Line |
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| By bus | About 25 minutes by bus from Jōmō-Kōgen Station (Shinkansen) |
| By car | About 10 minutes from the Minakami IC on the Kan-Etsu Expressway |
| Address | Gunma Prefecture／Tanigawa Onsen／Bettei Senjuan 614, Tanigawa, Minakami-machi, Tone-gun, Gunma 379-1619 TEL:+81-(0)278-20-4141 |