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Hakone Kowakien Ten-yu

箱根小涌園 天悠はこねこわきえん てんゆう

Hakone ryokan with private open-air baths in every room and two rotating communal baths

Lodging

Day Use

No

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Sauna room of any kind

Bathing Arrangements

Private BathNo

A private bath you can reserve for yourself or your group

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

KidsWith Conditions

Welcomes children and families

Children 7+ use the appropriate gender bath. Diapered children cannot use the tubs (washing area and in-room bath only).

WashingYes

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

Water treatment

Treated and recirculated(partial disclosure)
from Article 18 disclosure
  • Added water
    Yes
  • Reheated
    No
  • Recirculated
    No
  • Disinfected
    No
  • Bath additives
    Not disclosed

二ノ平温泉(源泉名:小涌園供給温泉)

Ninotaira Onsen (Kowakien Supply Spring)

Operated by · 箱根小涌園 天悠

Mixed source

塩
Chloride
Color
colorless and clear
Taste
tasteless
Odor
odorless
Hot source · 77°CHigh silica
Known good for
  • Warmingcold sensitivity
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin

A sodium chloride hot spring, steam-conditioned by blending several Miyagino wellheads with natural spring water. The source emerges at 76.5 °C — among the hotter natural sources — and its moderate salinity gives the salty, heat-retaining body typical of chloride water. A generous 121 mg/kg of metasilicic acid leaves a thin silica film that makes skin feel smoother. The water is colorless, clear, tasteless and odorless, and is diluted with water to bring it to a comfortable bathing temperature.

Analyzed Mar 3, 2017·神奈川県温泉地学研究所·Cert no. 神奈川県知事登録 第1号

Explore the water

Views

Mountains
Forest
Waterfall

Highlights

Foot Bath

About

Every room at this Hakone ryokan has a private open-air onsen bath in Shigaraki-ware. The two large communal baths rotate between men's and women's sides each night: one has an infinity-edge outdoor bath with views of the Hakone outer crater range, and the other looks out over a garden and a waterfall. Both have an indoor bath and a dry sauna. The spring water is a mildly salty sodium chloride type that leaves a warming feel on the skin. Guests also have free access to the adjacent Mori-no-yu (森の湯), an outdoor bath complex connected by a corridor on the ground floor.

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5.0

1 review

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Sergey M
2 years ago· edited

184. Hakone Kowakien Ten-yu ★★★ A modern hotel in Hakone with onsen. I stayed overnight. It is next to the Gora onsen, and there is a passage to it and to the convenience store in the same building, which turned out to be very useful in heavy rain. I saw a notice about an event with an onsen sommelier. I only had breakfast: a buffet with unlimited salmon roe, shrimp, and crab legs, very generous. Breakfast was substantial, and I’m curious what they will have for dinner. The onsen sets switch between men and women in the morning. According to all the signs, the water is the same in composition in all the onsen, clear, with a temperature of 40-41. 1. Evening set. 1.1. The indoor area consists of two baths. One has a large bubbling area. There is a sauna. 1.2. The outdoor area was especially great. It was pouring rain, and when the door to the outdoor area opened, water was flowing heavily down the steps, while the rain itself was cooling things down in a very fitting way. Outside there is a great stone bath with a view of the waterfall, all in pleasant evening lighting. You can linger there for a very long time. 2. Morning set. 2.1. The indoor bath is made very similarly to the indoor bath in the evening area. 2.2. The outdoor bath is an infinity onsen with a view of the mountains and forest. Very rich, very cool, and the view is great in daylight. 3. Bath in the room. On the balcony in the room there was a bath that could be filled at the press of a button. What pleased me was that the sign with the composition was honestly placed at the entrance to the balcony. Very cool baths. A top place. 12.07.2024 13.07.2024

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Last updated October 5, 2026