大涌谷温泉 蒸気造成混合泉3号線（強羅方面）と箱根登山鉄道株式会社5号、6号井蒸気造成泉（宮城野第133、134号）の混合泉
Owakudani Onsen steam-generated blended spring (Gora line No.3 + Hakone Tozan Railway wells No.5/No.6, Miyagino No.133/No.134)Operated by · 桐谷箱根荘 さくら亭
Mixed source
酸
Acidic
+ Chloride · Sulfate
A sodium-calcium chloride-sulfate spring created by blending steam-generated water from Owakudani and Hakone Tozan Railway wells. At pH 2.5 it is strongly acidic, sharp enough to sting slightly on contact and traditionally cited for stubborn skin conditions. The salt-and-sulfate body gives it noticeable mineral weight; the source emerges at a hot 56 °C and is cooled to about 41 °C at the bath.
pH
2.50
Acidic
Source temperature
56.3°C
Hot
Tonicity
1.29g/kg
Hypotonic
Free H₂S
0.10mg/kg
Low
Highlights
- Ultra-acidic
Analyzed Oct 21, 2015·神奈川県温泉地学研究所
