Wakura Onsen is known for its abundant salt content, which is unique to hot springs by the sea, and its colorless and transparent water. Its water quality has been highly valued since ancient times, as it was selected as a "third-class mineral spring in the world" at the International Mining and Technical Exhibition held in Germany in 1880. Its representative effects include the sterilizing effect on wounds and skin diseases, the moisturizing effect that prevents sweating and cooling, and the beautifying effect that tightens pores and improves skin. It is also effective for neuralgia, rheumatism, joint pain, bruises, cuts, and coldness.