Only as a set with lunch, there are different plans. Not required to book.
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Private bath available for day-use visitors or hotel guests to reserve
Shared bathing area for all genders
Welcomes children and families
Restaurant or dining open to visitors (not just hotel meal plans)
Shower, wash stations, soap and shampoo provided
Towels available to rent or borrow
On-site or nearby parking available
A quiet inn in Kawachinagano, about half an hour out of central Osaka, which bills its water as Osaka's hidden bath (kakureyu, 隠れ湯). The Nagano spring (Nagano Onsen, 長野温泉) is said to go back to the time of Empress Suiko, and from the late Meiji years into early Showa the site ran as Gokurakuji Onsen (極楽寺温泉) and drew writers of the day. The water is clear and odorless, a sodium and magnesium chloride bicarbonate spring that comes up cold and gets heated; it holds its warmth for a long while afterwards and leaves the skin smooth. The open-air bath is wide open to the sky, and there is an indoor bath and a sauna on both the men's and women's sides.
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Kawachinagano-so Visited for a day trip. Only available as a set with lunch, there are different plans, the main one is 1945 yen for a simple but tasty lunch and onsen. Pleasant but fairly ordinary feeling water, 41 degrees Celsius. Inside, there were hinoki cypress logs floating - it smells nice. Outside, the water contains black charcoal. The indoor bath and rotenburo (outdoor bath) have no view. Included in the Kisen achievement.
Last updated August 4, 2026