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Kajika no Yu

河鹿の湯かじかのゆ

Public Bathhouse
Chubu·Shizuoka

Day Use

Yes
13:00–22:00
¥350

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

Policies & Services

WashingNo

Shower, wash stations, soap and shampoo provided

西平泉 湧ヶ島29号

Nishihiraizumi Yugashima No. 29

Operated by · 伊豆市湯ヶ島財産区

Sulfate
Color
faintly yellow and clear
Taste
tasteless
Odor
odorless

Calcium-Sodium Sulfate spring

pH 8.0Weakly alkalineHot source · 45°C
Composition fingerprint1.1 g/kg dissolved · Hypotonic
Ca²⁺59
Na⁺40
SO₄²⁻90
CationsAnions
Calcium Ca²⁺
settling and calming; can leave a white mineral bloom.
Sulfate SO₄²⁻
"gypsum / Glauber's salt" — vessels and wound healing.
Known good for
  • Aches & jointsstiff shoulders
  • Circulationtired legs
  • Smooth skindry, rough skin

A calcium-sodium sulfate spring, settled and mineral-rich, emerging hot at 45.4 °C — among the warmer natural sources. Weakly alkaline and soft on the skin, it sits at the edge of Japan's beauty-water family. At the source the water carries a faint yellow tint, and it is otherwise tasteless and odorless.

Sampled at wellhead·Analyzed Jan 22, 2020·株式会社サイエンス·Cert no. 第温200102号

Explore the water

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1 review

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Sergey M
1 year ago

513. Kajika no Yu, Izu An old-man onsen for 350 with no staff — buy a ticket from the machine, then drop it in a box. Located in the building next to Yumotokan. Operating hours are listed as 13:00 to 22:00. Bath photo is from the internet, roughly matches — I visited in the evening. Clear water, temperature around 43-44. A bit stuffy inside. 09.05.2025

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Last updated July 3, 2026