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Kasuitei Ooya

花水庭おおやはなみずにわおおや

Lake-view open-air baths at a century-old ryokan on Kawaguchiko

Lodging
Chubu·Yamanashi

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 BathYes

A private bath you can reserve for yourself or your group

Room OnsenNo

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

KidsYes

Welcomes children and families

DiningYes

A restaurant or dining room open to visitors, not only meals for overnight guests

WashingYes

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

Water treatment

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

富士河口湖町第2号源泉

Fujikawaguchiko No. 2 Spring

Operated by · 花水庭おおや

硫
Sulfate
+ Chloride
Color
colorless and transparent
Taste
tasteless
Odor
odorless

Sodium Chloride spring

pH 7.1Neutral
Composition fingerprint1.8 g/kg dissolved · Hypotonic
Na⁺43
Cl⁻39
◀ CationsAnions ▶
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Aches & jointsstiff shoulders
  • Circulationtired legs
  • Warmingcold sensitivity

A calcium-sodium led sulfate-chloride spring drawn cold at 27 °C and reheated for bathing. Neutral pH with 1,843 mg/kg dissolved solids — sulfate gives quiet body while chloride layers in heat retention. At the wellhead the water is colorless, tasteless, and odorless; the temperature and warmth come from on-site heating rather than the source itself.

Sampled at wellhead·Analyzed Jul 18, 2019·一般社団法人 山梨県食品衛生協会·Cert no. 梨食第令1-4-19号

Explore the water

Views

Lake

Highlights

Utaseyu
Jet Bath

About

Kasuitei Ooya (花水庭おおや) sits on the shore of Lake Kawaguchi, a ryokan that has been here since the Taisho era (founded 1923). The shared baths draw from the Fujikawaguchiko natural spring. There are two separate bath areas: the basement-floor baths offer spacious indoor pools and open-air tubs with a waterfall shower, plus a sauna; the top-floor baths are the view baths, with open-air tubs looking directly over the lake. A private reserved bath, Ukifune (浮舟), is also on the top floor and can be booked by the session. In-room baths, where they exist, use Mt Fuji water rather than the spring.

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3.0

2 reviews

from 1 reviewer

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Sergey M
2 years ago· edited

160. Kasuitei Ooya, Kawaguchiko ★ I stayed here twice for one night. But it turned out that I did not visit the bath on the 7th floor either time, so this review is without taking that into account, it should be good. From the station, you can walk to the hotel without much effort, and it is by the lake. Once I booked a room with a bath in the room and a view of Kawaguchiko. The bath is comfortable for one person, the windows open, though not fully, toward the lake and toward the room balcony. It works well for a Witcher cosplay. It is comfortable to breathe in summer. The water is clear, with no smell. The temperature is hot. On that stay I ordered meals, and everything was very good. One of the public bath areas is on the first basement floor. It has an indoor bath and an outdoor bath, a cold-water bath, a sauna, and a round shallow bath with a mild temperature for rinsing off. The indoor bath has clear water, the temperature is hot, and there is not much smell. It is comfortable to breathe there on summer evenings. Even though it is an underground floor, there is an outdoor bath too. The water is clear, the temperature is hot to slightly hot. There is not much smell either. There are two utaseyu. Judging from the photos and the information, the hotel also has rooms with other baths inside, and there should be private baths on the 7th floor, where there is another public bath. A good ryokan, but in Kawaguchiko the problem in the competition is that there are lake views, but no Fuji views. 20.07.2023 21.07.2023 06.07.2024

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SM
Sergey M
3 years ago

Meals (dinner and breakfast) at Kasuitei Ooya 20.07.2023 21.07.2023

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Last updated October 11, 2026