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Three baths, one ancient spring. From the communal bath to the private tub — soak as many times as you wish in Yumoto's storied waters.

Three baths fed by Yumoto's ancient spring.

Hakone Yumoto's spring has soothed travellers since the Nara period. At Fukushimakan, three baths draw from this same ancient source — indoor, open-air, and private.

INDOOR PUBLIC BATH

Ōsugi-no-yu

A spacious all-hinoki indoor bath with a high ceiling. Take your time in Yumoto's ancient spring. Separated by gender.

OPEN-AIR BATH

Fuku-no-yu

A stone outdoor bath overlooking the inn's small courtyard garden. Ideal for a quiet soak under the evening sky. Gender rotation applies.

PRIVATE BATH

Shima-no-yu

Reserve the whole bath for your group. Available in one-hour slots — please book at the front desk.

SPRING TYPEAlkaline simple spring, clear
TEMPERATUREApprox. 42°C (heated)
BENEFITSNeuralgia, fatigue, skin care, rheumatism
DAY USEEnquire (weekdays only)

Three ways to experience
Fukushimakan's spring.

PUBLIC

Ōsugi-no-yu guide

Open 6:00–23:00. Gender rotation applies. The all-hinoki interior makes every soak feel indulgent. Morning bathing is especially recommended.

OPEN-AIR

Fuku-no-yu guide

Open 6:00–22:00. Gender rotation applies. A quiet evening soak while gazing at the courtyard is the inn's quintessential experience.

PRIVATE

Shima-no-yu guide

Available 15:00–21:00. One-hour slots, ¥1,500 per hour. Reserve at the front desk for complete privacy.

GUIDE

Bathing tips

Stay hydrated before and after. 15–20 minutes per session is ideal. Bathing about an hour before bed is said to improve sleep quality significantly.

The story of Hakone Yumoto's spring

Hakone Yumoto's spring is said to have been discovered by the monk Gyoki in 757 CE, making it one of Japan's oldest recorded hot springs. For over 1,200 years, travellers, samurai, and poets have all bathed here.

The water is an alkaline simple spring — clear, virtually odourless, and famously gentle on skin. With a pH of around 8.5, it has soothed generations of weary travellers.

Frequently asked questions.

What are the public bath hours?

Public and open-air baths: 6:00–23:00 (gender rotation applies). Private bath: 15:00–21:00 (reserve at front desk).

What does the private bath cost?

¥1,500 per hour (tax included). Reserve and pay at the front desk.

What type of spring is it?

Alkaline simple spring — clear and odourless. Gentle on skin, traditionally valued for neuralgia, fatigue, and skin care.

Are tattoos allowed in the baths?

Tattoos are not permitted in the public and open-air baths. The private bath is available.

Bath Enquiries

Private bath reservations and day-use bathing enquiries welcome.