白糸の滝温泉
Shiraitonotaki OnsenA simple sulfur spring of the hydrogen-sulfide type — the wellhead boils at 100 °C and is cooled to 55.5 °C for the baths, placing it among Japan's hottest natural sources. Weakly acidic with a faint tang on the skin, the water carries the unmistakable H2S note the cert calls out. The simple classification means light total mineralization, so despite the sulfur signature the touch on the skin stays gentle.
- Top-decile hot
株式会社東京環境調査センター·Cert no. 鹿児島県 第4号