Izumi-so

いづみ荘いづみそう

Lodging
Chubu·Shizuoka

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

伊豆長岡温泉(混合泉)

Izunagaoka Onsen (Blended Source)

Operated by · 伊豆長岡温泉事業協同組合

Mixed source

Sampled at mixing tank
Simple
Classification

Sodium Chloride-Sulfate spring

A gentle alkaline simple thermal spring, blended from some thirty wells across the Izunagaoka district. At pH 9.3 it is strongly alkaline, giving the slippery feel of the Japanese beauty-water family, while the dissolved-solids total of just 0.63 g/kg keeps the water light on the body. The wellhead runs at 62.5 °C, placing it among Japan's hotter natural sources.

pH
9.30
Alkaline
Source temperature
62.5°C
Hot
Tonicity
0.63g/kg
Hypotonic
Flow rate
1,883L/min
Very high
Color
nearly colorless and transparent
Taste
tasteless
Odor
odorless
Highlights
  • Top-decile hot
  • Top-decile alkaline

Analyzed Aug 15, 2024·一般財団法人静岡県生活科学検査センター

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SM
Sergey M
1 year ago

253. Izumi-so, Izunokuni Visited for higaeri at 1000 (listed hours 12:30–21:00). They stamp the 60+6 Onsen of Shizuoka 24/25 booklet. Online photos match. Outdoor bath with a view of a tiny garden with a lantern and bamboo. Clear water, temperature 43. Indoor bath with a bridge in the middle. On one side there's a stone wall where the water comes out. Clear water, temperature 40–41. Not bad, worth visiting if you're nearby.