Tamagawa Hot Spring, located in Semboku, Japan, is renowned for its therapeutic waters and unique geological features. This hot spring is notable for having the highest acidity of any hot spring in Japan, with a pH level of around 1.2. Visitors come to Tamagawa Hot Spring not only to soak in its mineral-rich waters but also to experience its naturally occurring radioactive stones, known as Hokutolite, which are believed to have health benefits.
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