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By Akira Uchida / Special to Ryoko Yomiuri Publication
11:33 JST,
October 29, 2025
There are hot spring resorts called “rajiumu” (radium) onsen in Japan. It is believed that people who bathe in them can raise their immune strength and the natural healing ability of the body by inhaling gases containing tiny amounts of radioactive elements, such as radon, from the hot water. I have...