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Private Sauna

In the private sauna filled with the soothing scent of Japanese hinoki cypress, you can also enjoy a löyly.
The temperature can be finely adjusted from 35°C to 110°C in 1°C increments.
Spacious enough for five adults and is equipped with Bluetooth speakers.

Finnish-style sauna
Open-air Terrace
Cold Plunge&Relaxation Area

Located right beside the sauna, a cold plunge and relaxation area are thoughtfully provided. The space opens onto a spectacular terrace overlooking Mount Kintoki, seamlessly connecting the open-air hot spring bath, a hinoki indoor bath, and a powder room. Embraced by the magnificent nature of Hakone Sengokuhara, the expansive 70 square meters open terrace offers an extraordinary private sauna experience where you can become one with nature. Savor this supreme moment of relaxation while staying well hydrated.

Open-air Onsen

An open-air bath fed by 100% natural hot spring water, surrounded by the lush highlands. The “Sodium-Chloride springs” has excellent heat-retaining and bactericidal effects, keeping your body warm long and helping to prevent chills. Its soft alkaline water (pH 8.6), rich in Metasilicic acid (a natural moisturizing ingredient), leaves skin smooth and refreshed. And making it “Hot springs for beautiful skin”.

Hakone Kairai's 100% natural hot spring open-air bath (rock)
Hakone Kairai's powder room and cypress indoor bath

Hinoki Bath and Powder Room

The shower room, integrated with a powder room, features a hinoki cypress indoor bath with reheating function and a small refrigerator. From the bedroom, you can move seamlessly to the open-air hot spring bath, sauna, and open-air terrace. Premium linens and high-quality original amenities are thoughtfully provided for your comfort and allowing you to arrive empty-handed. Sauna hats are also available for your use. (*Please note that swimwear is not provided)

Facilities Theater-style living room, Dining room with sunken kotatsu table (seats 6), Bedroom (twin beds + 23 tatami mats of Ryukyu tatami mats), Fully equipped kitchen, Open-air terrace, Open-air hot spring bath (rock), Indoor Japanese hinoki cypress bath, Private sauna with a cold plunge, 2 toilets, Garden.
Parking is available for 2 cars. Please contact us if you require parking for 3 or more cars. We will arrange it for you.
Equipments BALMUDA The Range oven microwave, Toaster, Electric kettle, Nespresso Genius coffee machine, Refrigerators (in both the kitchen and bathing area), Air purifier, Air conditioning, TV, Projector, Bluetooth speakers, Wi-Fi, Humidifier (in the bedroom), Hair dryer, among others.
Amenities Shampoo, Conditioner, Body wash, Facial cleanser, Moisturizing lotion, Essence lotion, Cleansing oil, All-in-one gel, Bath towels, Face towels, Bathrobes & Traditional samue loungewear, Tabi socks, Sauna hats, Cotton swabs, Cotton pads, Hairbrushes, Toothbrushes, Razors, among others.※Please note that swimwear is not provided.

HAKONE KAIRAI

Contact

Address

1246-469 Sengokuhara, Hakone-machi, Ashigarashimo-gun, Kanagawa 250-0631

Access

・About a 20-minute drive from Gotemba I.C. on the Tomei Expressway
・About a 55-minute drive from Atsugi I.C. on the Tomei Expressway
※Please note that the slope on the “Naka-dori” side is steep, which may pose a risk of scraping your vehicle. We kindly recommend approaching from the “Prince Street” side.
SENGOKUHARA WEATHER