Onsen with an open-air bath in Kumamoto
Rotenburo — bathing outdoors, which is what most people picture when they picture an onsen.
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Tsuetate Onsen Motoyu
杖立温泉 元湯
Policy not published (day visit)
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Ryokan Ichinoi
黒川温泉 旅館 壱の井
Tattoos OK (day visit)Tattoos OK (overnight)Private bathDay visits without staying
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Shinmeikan
黒川温泉 山の宿 新明館
Policy not published (day visit)Policy not published (overnight)Private bathDay visits without staying
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Jigoku Onsen Seifuso
地獄温泉 青風荘.
Policy not published (day visit)Policy not published (overnight)Day visits without staying
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Tarutama Onsen Takibiyori
垂玉温泉 瀧日和
OK in a private bath (day visit)Private bath
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Aso Bochu Onsen Yume-no-yu
阿蘇坊中温泉 夢の湯
Policy not published (day visit)