“Tamago no Yu” is a special hot spring originating from a source discovered 900 years ago by Hanko Takahashi. The water from this source is poured into the bath without any added water or heating, preserving its natural state and preventing oxidation. This method allows the skin to fully absorb the hot spring minerals, resulting in considerable health benefits. The temperature of the hot spring is a miraculous 43.5°C, gifted by the earth’s energy, creating an ideal bathing environment. Its flow-through system refreshes the water every three hours, maintaining a consistently clean state.