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Chateraise Hotel Isawa

シャトレーゼホテル 石和シャトレーゼホテル いさわ

Lodging
Chubu·Yamanashi

Day Use

Yes
10:30–21:30
¥1,000

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

新貯湯槽

Shin Chotoso (New Storage Tank) Spring

Operated by · 石和温泉管理事務所長

Simple
Color
colorless and clear
Taste
tasteless
Odor
odorless

Sodium Chloride-Hydrogen phosphate spring

pH 9.0AlkalineHot source · 44°CTop-decile alkaline
Composition fingerprint0.4 g/kg dissolved · Hypotonic
Na⁺90
Cl⁻57
HPO₄²⁻23
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
  • Smooth skindry, rough skin
  • Recoveryfatigue, stress

An alkaline simple thermal spring at pH 9.0, gentle and soft on the skin. Lightly mineralized at around 396 mg/kg of dissolved solids, it is clear, colorless, tasteless and odorless, with little chemical sharpness. The alkalinity gives the slippery feel of the Japanese beauty-water family, making it a pleasant, undemanding soak.

Sampled at mixing tank·Analyzed Jul 2, 2015·一般社団法人 山梨県食品衛生協会·Cert no. 梁食第27-2号

Explore the water

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1 review

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Sergey M
1 year ago

560. Chateraise Hotel Isawa, Fuefuki, Yamanashi Visited for higaeri at 1000. Higaeri hours are listed as 10:30 to 21:30. In the Yamanashi 100 Onsen stamp book they stamp a different stamp. 1. Outdoor bath with clear water, temperature around 42.5. 2. Indoor area. Breathing inside is fine. 2.1. Bath with clear water, temperature around 41. 2.2. Bubble bath. Clear water, temperature around 42. 13.05.2025

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Last updated July 3, 2026