温泉の科学

[DeepL Translation - needs review] Water that is only warm is not an onsen. This article explains in detail what can be called a hot spring in Japan. This is the first volume of the "Onsen Science Series" from Oita Prefecture, the largest "Onsen Prefecture" in Japan. It was created by a member of the "Society for Creating Exciting Readings from Oita".

(Translator: DeepL)