HAKONE KAIRAI -Private & Open-air Bath Reports (1)-
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| Guest room open-air bath | |
| Surrounded by large rocks, the open-air bath offers a view of the trees in the garden during the day and the moon and stars at night. We want you to enjoy the luxury of soaking in the hot spring as much as you like, whenever you like. The bathtub is large enough for 2 adults. The alkaline pH of 8.6 makes your skin feel smooth and silky. The spring quality is “Sodium-Chloride springs”. To explain scientifically, a hot spring has more than 1,000 mg of dissolved substances (excluding gaseous ones) in 1 kg of hot spring water, and the main component of anions is Chloride Ions (Cl-). When you soak in the hot water, the salts cover your body like a pack. This pack blocks the sweat glands (the organs that secrete sweat), so the body temperature drops slowly after bathing, and the feeling of warmth lasts longer. For this reason, chloride springs are also called “Hot springs for warmth”. Other types of springs may also be indicated for treating sensitivity to cold, but “Chloride springs” are particularly effective. At the same time, the long-lasting warming sensation helps improve peripheral circulation disturbances. This salt pack also reduces skin dryness after the bath due to the coating and moisturizing effects of the hot spring components. In particular, the moisturizing component, metasilicic acid, easily exceeds the qualification standard of 50 mg/kg for hot springs, which is 182 mg/kg, making it a great spring for those with dry skin. And the sustained heat retention effect helps balance the autonomic nervous system, bringing a sense of mental stability. Furthermore, the increase in body temperature suppresses the secretion of stress hormones, which may contribute to the improvement of mood, and is effective for depression. Also, after bathing in so-called “Hot springs for beautiful skin” such as “Alkaline simple hot springs”, “Hydrogen carbonate springs”, “Sulfate springs”, and “Sulfur springs”, which remove dead skin cells, “Chloride springs” are also called “Hot springs for finishing touch” due to their salt coating and moisturizing effects. Moreover, it is sometimes called “Hot springs for cuts” due to the bactericidal effect of the salt, which is effective against cuts and burns. This hot spring is brought in at a rate of 3 tons per week from the Gora area, where the source well is located. For sanitary reasons, the hot spring is circulated and filtered, and disinfected with chlorine. |
HAKONE KAIRAI Travel Journal
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Private & Open-air Bath Reports
Surrounded by large rocks, the open-air bath offers a view of the trees in the garden during the day and the moon and stars at night. We want you to enjoy the luxury of soaking in the hot spring as much as you like, whenever you like.......
Facilities & Hot Spring Reports
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Guest Room Reports
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Extra Reports
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| Keywords for this inn | |||
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| Located on the peaceful plateau of Hakone Sengokuhara, an adult secret inn limited to 1 couple per day |
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| Open-air bath surrounded by greenery with “Hot spring for beautiful skin” that will change its impression by season and time of day |
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| A vast open terrace with a Finnish sauna all to yourself | |||
| Chef's special dinner and breakfast using many carefully selected ingredients | |||
| A higher grade holiday spent in a fully equipped theater room and other facilities | |||
| Suitable for these people | |||
| Those who value privacy - Limited to 1 couple per day for a villa rental Those who want to feel nature - A vast open terrace to love Hakone's mountains and starry sky Those who are health conscious - Recommended morning walk to Sengokuhara Pampas Grass Fields Golf enthusiasts - Golf course is within walking distance |
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| Not suitable for these people | |||
| Those who need to be close to downtown Those who want to make noise in a group |
| Check-In | 3:00 p.m. | ||
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| Check-Out | 11:00 a.m. | ||
| Card usage | Available | ||
| Room Views | Mountains, Garden | ||
| In-room Meal | Dinner & Breakfast are basically served in the room | ||
| Dinner | Sukiyaki or Shabu-Shabu | ||
| Breakfast | Western style breakfast | ||
| Official website's online reservation benefits | 【Opening Special】15% OFF with Dinner & Breakfast｜Weekday stays in June & July only 【Opening Special】15% OFF with no meal｜Stays in June & July only |
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| Overnight stay with no meal | From 60,000 yen | ||
| 1 night with 2 meals | From 82,000 yen | ||
| Establishment / Reconstruction | Established: 2025 | ||
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| Number of Rooms | Total 1 room (1 guest room with Open-air bath) | ||
| Number of People Accommodated | 4 persons | ||
| Private bath | Guest room open-air bath×1 Usage hours : 24 hours View : Stone garden, Mountain cherry blossoms |
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| Large public bath and other | - | ||
| Parking Area | 2 cars | ||
| Pets | Not allowed | ||
| Barrier Free | Not supported | ||
| Esthetics / Massages | None | ||
| Internet | Wi-Fi available in all building | ||
| DVD | VOD (Video on Demand) and video streaming services such as Prime Video and Netflix are available with an account | ||
| TV Channels | Digital terrestrial television | ||
| Facilities | Private sauna / Open-air bath / Cinema room, etc. | ||
| Refrigerator System | Beverages and snacks are all-inclusive | ||
| Vending Machine | － | ||
| Sales shop | － | ||
| Yukata | ◎ | Bath towels | ◎ |
| Towels | ◎ | Soap | ◎ |
| Body wash | ◎ | Shampoo | ◎ |
| Conditioner | ◎ | Rinse in shampoo | ◎ |
| Shower cap | ◎ | Toothbrush | ◎ |
| Hair dryer | ◎ | Brush | ◎ |
| Comb | ◎ | Razor blade | ◎ |
| Cotton bud | ◎ | Toilet with washer | ◎ |
| Wheelchair | － | ||
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| Child | － | ||
| Foreign Languages | English | ||
| Recommended Souvenirs | － | ||
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| Nearby Convenience Store | 5 min. on foot | ||
| Cellular Antennas | ◎docomo | ◎au | ◎softbank |
| Charges | － | ||
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| Usage time | － | ||
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| Charges | － | ||
| Meal Details | － | ||
| Settlement Date | － | ||
| Usage Time | － | ||
| Other | － | ||
| Spring quality | Sodium - Chloride springs (Hypotonic, Alkaline, High temperature spring) | ||
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| Temperature of the source | 89.8℃ | ||
| Output rate | Source usage - About 300 cc/min ※About 3 tons (3,000 liters) are used every week | ||
| Hydrogen ion | pH 8.6 | ||
| Total dissolved substances (excluding gases) | 2,919 mg/kg | ||
| Gushing of the source | Hot water carried from nearby Gora Onsen | ||
| Add water / Circulation Filtration | Yes |
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| Water heating | Yes | ||
| Disinfection of bath | Yes (chlorine tablets) | ||
| Replacement of hot water in bathtub | Once a day | ||
| Bath Additives | No using | ||
| Indications by Spring Quality (Revised on July 1, 2014) | Cuts, Peripheral circulatory disturbance, Sensitivity to cold, Depression, Dry skin | ||
| General Indications for Bathing (Revised on July 1, 2014) | Chronic pain or stiffness of muscles or joints (chronic phase of rheumatoid arthritis, osteoarthritis, lower back pain, neuralgia, frozen shoulder, bruises, sprains, etc.), muscle stiffness in motor paralysis, sensitivity to cold, peripheral nerve disorder, decline of gastrointestinal function (slow digestion, intestinal gas formation, etc.), mild high blood pressure, impaired glucose tolerance (diabetes), mild hypercholesterolemia, mild asthma or emphysema, hemorrhoidal pain, autonomic instability, various symptoms from stress (sleep disorders, depression, etc.),convalescence stage of illness, recovery from fatigue, promotion of health. | ||
| Color of water | Clear and colorless | ||
| For drinking | Cannot ※Non-submission of application for drinking to the health department | ||
| Indications for drinking | ― | ||
| Smell / Taste | Tasteless and odorless | ||
| By Train | Hakone Tozan Bus, Momogendai Line, 5 min. walk from Sengoku-kogen | ||
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| Shuttle bus | ‐ | ||
| By Car | About 40 min. from Odawara IC, about 20 min. from Gotemba IC ※The slope from the "Naka-dori" side is steep and may scrape your car. We recommend that you come from the "Prince street" side. |
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| Nearby Sightseeing Spots | Sengokuhara Pampas Grass Fields, Hakone Venetian Glass Museum | ||
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| Recreation (tourist farms, parks, etc.) | Hakone Botanical Garden of Wetlands | ||
| Sports | － | ||
| Staff messages | HAKONE KAIRAI: Comment from Kirari Fujimoto, a room attendant Limited to only 1 couple per day, this is a secret inn where you can rent an entire house. Surrounded by nature, you will enjoy the tranquility and healing time. Please enjoy your private time in a space that combines the serenity of “Japanese” with the openness of a “Resort” without being disturbed by anyone. |
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| Date of Interview | Jun 16, 2025 | ||
| Date of Information update | ‐ | ||
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※When making a reservation, please mention that you saw "kashikiri-onsen.com" |
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Article creator of this ryokan
CEO of Onsen.com Co.,Ltd.
For more than 30 years, he has been visiting hot spring ryokans all over Japan, persuading innkeepers of the need for "private baths". He is still a traveler who spends half of the year at a hot spring. In addition to being a article creater, photographer, and drone pilot, he also designs websites and provides consulting services.
