Japanese Onsen & Sauna Guide
Spring Quality & Science
Deep dive into onsen spring types, components, and scientific knowledge
AllBasic Knowledge and IntroductionThe Appeal of Japan's Hot Springs and SaunasHealth & BenefitsSpring Quality & ScienceThematic GuidesTips for a Successful Trip
25 articles in total
Spring Quality & Science
Sulfate Hot Springs: Why Called 'Wound Baths' & Safety
Learn what sulfate hot springs are, how calcium- and sodium-types differ, how they feel, why called 'wound baths', and key safety tips for bathing and drinking.
Dec 24, 2025
Spring Quality & Science
Bicarbonate Hot Springs: Why They're Called Beauty Baths
Confused by bicarbonate hot springs? Learn why they're called beauty baths, how the water affects skin, and post-bath hydration and safety tips for beginners.
Dec 24, 2025
