———— Himekawa Yakuseki & Hokutolite ——— ◆ Himekawa Yakuseki This is a type of igneous rock quarried on the coast of Itoigawa City, Niigata Prefecture. It has a long history of being used in traditional Chinese medicine, where it was called "Toraseki" (Tiger Stone) and used for treatment. It is believed to improve immunity, and local lore suggests that holding Himekawa Yakuseki is beneficial when feeling unwell. It contains trace amounts of radioactive elements such as radium and thorium, which emit radioactive noble gases like radon and thoron. The hormesis effect (an adaptive response that provides resistance to specific substances) is expected, leading to improved immunity. ◆ Hokutolite Hokutolite is only found in the Beitou Hot Spring in Taiwan and the Tamagawa Hot Spring in Akita Prefecture, Japan. It is said to be a stone that makes doctors unnecessary, and because it contains radioactive radium, it is praised for its beauty and health benefits, "as if you are wearing a hot spring." Hokutolite can be expected to have effects from far-infrared rays and negative ions. It is said to have effects such as fatigue recovery, relaxation, blood purification, cell activation, increased resistance, and regulation of the autonomic nervous system. Hokutolite is a lead-containing barite that contains radioactive radium. Therefore, there are concerns about radiation exposure, but both radium and radon, which is produced by the decay of radium, are present in very small amounts, and most of it is alpha rays. Alpha rays can be blocked by a single sheet of paper, so there is no problem unless inhaled into the body. Also, radon is one of the noble gases, but its half-life is less than 4 days, and it is said to be quickly expelled from the body even if it enters. Please use it as if you have gone to a radium hot spring. For better effects, it is recommended to wear it for about 8 hours a day ^_^ ◆ Size Himekawa Yakuseki: 8mm Hokutolite: 8mm Inner diameter: 15cm ◆ Uses Ope-Ron Rubber (Brown)