The source spring is called Osaki Onsen. The water quality is sodium chloride and bicarbonate spring, classified as low osmotic pressure, weakly alkaline, and high temperature. Source temperature 56°C, pH 8.0, pumped at 380 liters per minute. The salt provides heat-retaining properties that create a warming bath and, through its antiseptic effects, benefits for minor wounds, while the bicarbonate content contributes to skin-beautifying effects, combining the advantages of both spring types. These qualities can be enjoyed in the open-air baths overlooking Omura Bay and the spacious main bathing pool. Private family baths are provided with continuously flowing source water. The spring is also effective for chronic digestive disorders, sensitivity to cold, chronic skin diseases, and other conditions.

A walking pool where swimwear must be worn. By walking while immersed up to above the knees, benefits can be expected for sensitivity to cold, menopausal symptoms, and insomnia. It is also ideal for rehabilitation and moderate exercise, and many local users visit regularly for health promotion. You can condition your body and mind with minimal strain while enjoying the minerals from the hot spring.