Aratae Uzushio Hot Spring

The highly concentrated calcium-sodium chloride cold mineral spring is rich in chloride and notable for its strong heat retention that warms the body from the core. It is recognized as a therapeutic spring with benefits for minor wounds, peripheral circulatory disorders, sensitivity to cold, depressive symptoms, and dry skin. From the men's outdoor bath you can take in a panoramic view of the Boat Race Naruto course and the sea—an extraordinarily rare sight in Japan that allows guests to watch boat races while bathing. The women's bathing area (White) is styled with a Roman-inspired open bathtub and green accents, creating a soothing atmosphere.

Carbonated Bath

A high-concentration carbonated spring in which abundant carbonic acid gas is dissolved. Fine carbonic bubbles cling to the skin, dilate blood vessels, and promote blood circulation. The bath's effects are attracting attention in medical, nursing care, and beauty fields, and the water warms the body easily even at milder temperatures. On certain event days the bath is boosted as a "super high-concentration carbonated spring," providing an instant fizzy sensation as bubbles cling to the body immediately after entering. You can relax and enjoy the penetration effects of the carbonic bath in a spacious tub.

Tsubo Bath

Jet Bath

A jet bath where vigorously ejected bubbles strike the shoulders, lower back, and legs directly. The water pressure from the jets works precisely on tired or tense areas, providing a massage effect. It is suitable for recovering from muscle fatigue after hot spring bathing or long drives and sightseeing.

Electric Bath

An electric bath where weak electric currents act like an underwater low-frequency therapeutic device. It can help relieve stiffness and chronic pain, and once accustomed to the unique tingling sensation many find it a pleasant stimulus. Under facility regulations, bathing is prohibited for users with pacemakers.

Finnish-style löyly sauna

A relatively spacious dry sauna centered around an IKI stove. The three-tier bench layout is complemented by an automatic löyly that activates at the top of each hour, filling the room with steam. Water is ladled over the top of the stove so the steam spreads outward, then a distinctive convection—heat pooling at the ceiling and slowly descending over the whole body—creates a very pleasant sensation. During löyly the lighting is dimmed and the stove is illuminated for added effect.

Finnish-style löyly sauna

A dry sauna installed in the women's bathing area. Regular automatic löyly sessions provide humidification and a steady, thorough sweating experience. Totonou chairs are provided both in the indoor bath area and in the outdoor open-air relaxation space, making post-sauna cooldowns comfortable.

Cold Bath

The 17°C cold sensation of the cold plunge bath quickly tightens the body after a hot sauna session and smooths the transition to totonou. The route from the cold plunge bath to the outdoor relaxation area is short, and the greatest pleasure of this facility is the open-air relaxation while reclining on summer beds or Adirondack chairs and watching the boat race course.