Onsen OniOnsen Oni

Shinanoki Ichinoyu

仙石原品の木一の湯せんごくげんぴんのきいちのゆ

Lodging
Hakone OnsenSengokuhara Onsen
Kanto·Kanagawa
0460-85-2244ichinoyu.co.jp

Day Use

Yes
13:00–20:00
¥1,400

Adult 1,400 yen (tax incl.); child (4-12) 700 yen. Free face towel and bath towel rental. Last entry 19:30.

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

OnsenYes

Uses natural hot spring water

Capabilities

Private BathNo

Private bath available for day-use visitors or hotel guests to reserve

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooNo

Allows entry with visible tattoos

Tattoos not allowed in the public baths. The private barrel sauna is an exception — guests change privately so tattoos are permitted there.

KidsWith Conditions

Welcomes children and families

Children welcome; mixed-gender bathing with children permitted up to preschool age only. Children under 18 not allowed in the barrel sauna.

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

Water treatment

from Article 18 disclosure
  • Added water
    Yes
  • Reheated
    Yes
  • Recirculated
    Yes
  • Disinfected
    Yes
    塩素系薬剤
  • Bath additives
    No

大涌谷温泉 蒸気造成混合泉 2号線(仙石原方面)、3号線(強羅方面)

Owakudani Onsen Steam-Generated Blend (Line #2 Sengokuhara, Line #3 Gora)

Mixed source

硫
Sulfate
+ Chloride

An acidic calcium sulfate-chloride spring fed by steam-generated condensate from Owakudani. At pH 2.1 the water is sharply acidic — strong enough to sting slightly on contact — and carries a faint milky cloudiness with a whiff of hydrogen sulfide. The 60.6 °C source sits squarely in the family of acidic springs long associated with stubborn skin conditions.

Source temperature
60.6°C
Hot
Tonicity
1.28g/kg
Hypotonic
Free H₂S
1.28mg/kg
Typical
Color
slightly cloudy white
Odor
faint hydrogen-sulfide note
Highlights
  • Ultra-acidic

Analyzed Sep 28, 2018·神奈川県温泉地学研究所·Cert no. 神奈川県知事登録第1号

Views

Mountains

About

Two separate springs feed the baths here: a sulfurous rotenburo (露天風呂) drawn from the Owakudani (大涌谷) source, and a smooth alkaline indoor bath from a different spring. Most guest rooms have their own private outdoor tub. A private barrel sauna with outdoor cooling area rounds out the facilities. Day visitors can use the communal baths without staying.

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SM
Sergey M
1 year ago

174. Shinanoki Ichinoyu, Hakone Located in the northern part of Hakone. Day-use bathing costs 1400 with a towel set + the receipt lets you visit other Ichinoyu locations in Hakone for free that same day. Day-use hours are 13:00 to 20:00. Indoor bath with clear water, no notable smell. Hot+ temperature. Comfortable to breathe inside. Outdoor rectangular bath. Water is slightly cloudy with a very small amount of calcium deposits. Hot+ temperature. Weak view of a fence-wall and treetops. Convenient to stop by with the Ichinoyu pass from a nearby location. Definitely not worth going out of your way for — can be skipped.