共同噴気泉(なかの湯)
Kyodo Funkisen (Naka-no-yu)酸
Acidic
+ Sulfur
- Color
- colorless and clear, with a strong hydrogen sulfide odor and a sour, bitter taste
- Taste
- sour and bitter
- Odor
- strong hydrogen sulfide
pH 2.6AcidicHot source · 79°CUltra-acidicSulfur-rich
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A simple acidic sulfur spring (hydrogen sulfide type) drawn from the communal steam vent 'Naka-no-yu' on the Maeguro slopes of Nasu-Shiobara. The wellhead runs at 79.2 °C — among Japan's hottest natural sources — and at pH 2.6 it is sharply acidic enough to sting slightly on contact. The water is colorless and clear at the source but carries a strong rotten-egg note of H₂S along with a sour, bitter taste; with 55.4 mg/kg of free hydrogen sulfide it has the unmistakable bite and skin feel of an acidic sulfur spring, long known for stubborn skin conditions.
Sampled at wellhead·Analyzed Jul 20, 1993·栃木県郡部協会
