In Ikaho hot spring there is “golden hot water” which is characterized by hot water color and “colorless transparent” “white silver water”. Originally it is golden hot water, the iron contained in the hot water touches the air, it oxidizes and becomes a distinctive brownish color. Ikaho Onsen has healed many people as a place of medical treatment and restitution because of little irritation and soft skin of the skin. In particular, it has been known as a women-friendly “ken no yu” as it warms the body from its core and promotes blood circulation.