Onsen OniOnsen Oni

Kame No Yu

亀の湯かめのゆ

Public Bathhouse
Hakone OnsenNinotaira Onsen
Kanto·Kanagawa
0460-82-2344onsen.surugabank.co.jp

Day Use

Yes
11:00–19:00

不定休

¥650

大人650円（入湯税50円含む）、子ども400円、家族風呂850円（2025年4月1日より値上げ）

Bathing & Water

Outdoor BathNo

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

OnsenYes

Uses natural hot spring water

Capabilities

Private BathYes

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

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

Rest AreaYes

Relaxation space for after bathing

ParkingYes

On-site or nearby parking available

二ノ平温泉

Ninohira Onsen

Operated by · 亀の湯

曹
Bicarbonate
+ Sulfate · Chloride

A sodium-led bicarbonate spring — the classic 'jūsō-sen' style — layered with sulfate body and a salt-tinged finish, emerging hot at 59 °C. Alkaline (pH 8.6) with a slippery beauty-water feel on the skin. A generous 224 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother afterwards.

Source temperature
59.0°C
Hot
Tonicity
1.00g/kg
Hypotonic
Free CO₂
1.20mg/kg
Low
Color
colorless and clear
Taste
no taste
Odor
no odor
Highlights
  • High silica

Analyzed Jun 11, 2019·一般財団法人 北里環境科学センター·Cert no. 宮城野第28号

About

Kame no Yu (亀の湯) is a small communal bathhouse in Hakone's Ninotaira neighborhood, open since 1953. From the outside it looks like an ordinary house and is easy to walk past. Inside there are separate baths for men and women, plus a private family bath. The spring water leaves the skin notably smooth. Payment goes into a coin box; the place is often unstaffed.

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SM
Sergey M
1 year ago

185. Kame-no-Yu, Hakone Old-school onsen. Price 550, private bath is apparently 750 (didn't take it). Looks like they set up an onsen in a small old residential house. When I arrived, no staff was around, so I put 1000 in the box, grabbed tea from the fridge, and went to the onsen. Inside there's a small bath with clear water, temperature 42. Comfortable to breathe inside. When I was leaving, a man from the staff appeared and gave me my change. If you want an old-school experience in Hakone, worth visiting.