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
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).
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
Rest AreaYes
Relaxation space for after bathing
ParkingYes
On-site or nearby parking available
Water treatment
from Article 18 disclosure
Added water
Yes
Reheated
No
Recirculated
No
Disinfected
No
Bath additives
Not disclosed
塩
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
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.
Source temperature
76.5°C
Hot
Tonicity
1.03g/kg
Hypotonic
Free CO₂
8.32mg/kg
Low
色
Color
colorless and clear
味
Taste
tasteless
香
Odor
odorless
Highlights
High silica
Top-decile hot
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
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.
184. Hakone Kowakien Ten-yu
Modern hotel in Hakone with onsens. Stayed overnight because of the infinity onsen with forest and mountain views. Located near the Hakone Gora onsen and has a walkway to it and to a convenience store in the same building (the latter was very handy in heavy rain). Booked breakfast only: a buffet with unlimited salmon roe, shrimp, and crab legs — very impressive. Saw a notice about some event with an onsen sommelier.
The onsen sets rotate between male/female in the morning. Water composition is the same across all baths according to the signs, clear, temperature 40-41.
1. Evening set.
1.1. Indoor area has two baths. One has a generous bubble zone. There's a sauna.
1.2. The outdoor area was especially awesome. Heavy rain was falling and when you opened the door to the outside area, water was flowing abundantly down the steps, and the rain itself was perfectly cooling. Outside there's a great stone bath with a waterfall view, all in pleasant evening lighting. You could zone out there for ages.
2. Morning set.
2.1. Indoor bath is very similar in design to the evening set's indoor bath.
2.2. The outdoor bath is an infinity onsen with mountain and forest views. Seriously impressive, cool, and a great daytime view.
3. In-room bath. On the room's balcony there was a bath you could fill by pressing a button. Nice touch — the water composition sign was honestly posted at the balcony entrance.
If you need an infinity onsen in Hakone or want a hotel with aesthetically powerful onsens that isn't a ryokan — this is an excellent choice. Breakfast was impressive, curious what their dinner is like.