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