Free-flow from source
Natural Hot Spring "Kakuju no Yu"
A rich private spring gushing from an ancient stratum 1,300 m underground. The water quality is a sodium chloride hot spring (hypotonic, neutral, high-temperature spring). Because its salinity clings to the skin and helps prevent sweat from evaporating, it is loved as a "hot spring of warmth" and a "warming spring," and it is known for helping you stay warm long after bathing. In the open, spacious "upper-level stone bath" of the large outdoor bath area, you can enjoy it as undiluted free-flowing natural spring water.