Aratae Uzushio-no-Yu

This hypertonic calcium-sodium chloride cold mineral spring is rich in chlorides and is notable for how well it holds warmth, heating the body thoroughly to the core. It is also a recognized therapeutic spring with approved indications for cuts, peripheral circulatory disorders, sensitivity to cold, depressive states and dry skin. From the men’s open-air bath you can take in the Boat Race Naruto course and the sea in a single view, and watching the boat races while you bathe, a scene unmatched anywhere else in Japan, is its greatest draw. The women’s bath (White) is arranged as a soothing space, with open, Roman-style baths set off by greenery.

Carbonated bath

A carbonated bath with a high concentration of dissolved carbon dioxide. Fine bubbles cling to the skin, dilating blood vessels and promoting blood flow. Its effects draw attention in the fields of medicine, nursing care and beauty, and it warms the body easily even at a lukewarm temperature. On event days it becomes a “Super Strongly Carbonated Bath,” with stronger carbonation than usual, and from the moment you get in, fizzing bubbles envelop your whole body. In the spacious tub you can soak at leisure and enjoy the penetrating effect of the carbonation.

Ceramic urn bath

Jet bath

A jet bath whose forceful bubbles hit the shoulders, lower back and legs directly. The pressure of the jets works precisely on tired, stiff spots for a massaging effect. It is well suited to recovering from muscle fatigue after bathing in the onsen or after a long drive or a day of sightseeing.

Electric bath

An electric bath in which a weak electric current turns the water into a low-frequency therapy device. It can be expected to ease stiffness and chronic pain, and once you get used to its distinctive tingle, it becomes a pleasant stimulation. Under the bathhouse’s rules, people with pacemakers may not use it.

Finnish löyly sauna

A roomy dry sauna with an IKI stove at its center. The benches rise in three tiers, and automatic löyly at the top of every hour fills the room with steam. Water is poured so that it spreads out from the top of the stove, and the distinctive convection, with heat pooling at the ceiling before slowly descending over the whole body, feels wonderful. During löyly, the lights dim and the stove is lit up for added drama.

Finnish löyly sauna

A dry sauna in the women’s bath. Automatic löyly at regular intervals tops up the humidity for a slow, thorough sweat. Chairs for the cool-down are set out both in the indoor bath area and in the open-air space for cooling off, so the cool-down after the sauna is comfortable too.

Cold Bath

At 17°C (63°F), the firm cold quickly pulls a sauna-heated body taut and eases the shift into totonou, a state of deep relaxation. The open-air area is just steps from the cold plunge, and cooling off in the open air on a lounger or an Adirondack chair while watching the boat racecourse is the greatest pleasure this place has to offer.