Onsen OniOnsen Oni

Susukinohara Ichinoyu

ススキの原 一の湯ススキのはら いちのゆ

Lodging
Hakone OnsenSengokuhara Onsen
Kanto·Kanagawa
0460-86-3331ichinoyu.co.jp

Day Use

Yes
13:00–20:00
¥1,400

Adults ¥1,400 (tax incl.), children (ages 4–12) ¥700. Face towel and rental bath towel included free.

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

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

KidsWith Conditions

Welcomes children and families

Children may bathe with the opposite gender in shared baths up to preschool age (未就学児まで). Children's meals and baby amenities available.

DiningYes

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

Dining is for lodging guests and affiliated Ichinoyu group guests only. External (外来) dining not available.

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

大平台温泉(第3号井戸)

Ohiradai Onsen (Well No. 3)
湯
Simple

Drawn from Well No. 3 of the Ohiradai source, this is an alkaline simple thermal spring — hot at the wellhead (65 °C) and squarely in the Japanese 'beauty-water' family, with pH 9.2 giving a noticeably slippery feel on the skin. Mineralization is light (775 mg/kg), but a healthy 67.7 mg/kg of metasilicic acid leaves a thin silica film that smooths the skin. Colourless, tasteless and odourless — a clean, well-behaved water.

Source temperature
65.0°C
Hot
Tonicity
0.78g/kg
Hypotonic
Free CO₂
0.10mg/kg
Low
Color
colorless and clear
Taste
tasteless
Odor
odorless
Highlights
  • High silica
  • Top-decile hot
  • Top-decile alkaline

Analyzed Oct 17, 2014·一般財団法人 北里環境科学センター·Cert no. 温泉村 第126号

About

Every room at this Hakone ryokan comes with its own private rotenburo (露天風呂), so you can soak whenever you like without heading to a shared bath. The communal baths are worth visiting too: the outdoor pool sits inside a cypress forest, and the two springs used here are quite different from each other. The outdoor bath draws from Owakudani (大涌谷), an acidic spring, while the indoor bath uses a milder alkaline spring from Daito-dai (大平台). Day-use bathing is also available for visitors not staying overnight. The ryokan is part of the Ichinoyu (一の湯) group and sits in Sengokuhara (仙石原), the part of Hakone known for its pampas grass fields.

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SM
Sergey M
1 year ago

171. Susukinohara 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, hot temperature. There's a slight specific sulfur smell. Comfortable to breathe inside. The outdoor bath has different water — mostly clear but with fine white calcium deposits. Faint sulfur smell. Hot water temperature. Early in the day there were lots of insects in the water — had to do some cleanup. View from the bath was of some hydrangeas. Nice place, I liked it. If you're doing a run of other Ichinoyu spots, it'll be a good deal cost-wise too.