It is pure water that naturally comes about and contains minerals more than ordinary water. Mineral water under the ground which is very deep, and thus germs cannot grow. In addition, while the water is permeating into the underground, it has passed filtering process from the layer of rock, earth and sand. So the water obtained is clean and contains a lot of accumulative minerals. Such minerals are both advantageous and disadvantageous for the body. Therefore, there must be standards to inspect those water sources and this hot mineral water has been inspected, analyzed and certified by Department of Science Service and IQA Laboratory Co., Ltd. that is safe and can be used for bathing or soaking