A luxurious large public bath fed 100% with natural flowing hot spring water from two private sources, the oldest in Ajiro Onsen, with separate springs used for the open-air bath and the indoor bath. Located right at the water's edge of Ajiro Bay, the open-air bath offers an overwhelming sense of unity, as if you were floating on the sea. The hot spring water is highly transparent and has excellent skin-beautifying benefits, superb heat retention, and outstanding fatigue recovery effects, with a very rich spring quality. The bath is completely drained and thoroughly cleaned every night at 23:00, so you can enjoy an exceptionally clean and fresh first bath every day to your heart's content.

Shiosai is a popular private open-air bath where you can have the sea and sky of Ajiro all to yourself. In an open space where the sea breeze flows directly through, you can casually enjoy the rich natural hot spring water, flowing 100% from the inn's own source. It is a superb space that combines the pleasant feeling of floating as if suspended in the sky or sea with the calmness unique to a private setting. Ideal for bathing with family or a loved one while gazing at the breathtaking starry sky or sunset in complete privacy.