About This Video
Located in the mountains of the Akita Towada-Hachimantai National Park, Tamagawa Onsen is a unique hot spring resort! Indeed the onsen is famous for having Japan’s most acidic hot spring water with a pH of around 1. It features a very rare radioactive stone, known as Hokutolite. The stone is believed to have a wide range of health benefits, including but not limited to preventing cancer, thus attracting many cancer patients across Japan.
The Tamagawa Onsen valley is also the place of Japan’s single most productive hot spring source capable of delivering up to 900 liters of 98c hot water is a single splash. It is also populated by many smaller sources of hissing sulfur and hot water, making the soil of the whole area often hotter than the surrounding air. This explains why many people lay down on the ground during autumn to keep warm while inhaling the supposedly healthy sulfurous air as well as hoping to absorb some of the radioactive Hokutolite stone’s purported health benefits.
