Okuhida Onsen

For nearly 300 years, artisans , have harvested mineral-rich "yunohana" crystals from geothermal steam using traditional straw-thatched huts called yunohana‑goya, a craft designated as a nationally important intangible folk cultural asset. These naturally formed crystals, made without additives or heat, are transformed into bath powders that recreate the benefits of a Japanese onsen soak at home, offering circulation support and skin nourishment through pure minerals and thermal energy . Today, the company continues to honor this centuries-old tradition, blending artisan stewardship with a deep respect for cultural heritage.