Taka Ra No Yu

387. Takara no Yu, Kikuchi, Kumamoto Onsen for 400 yen. Operating hours listed as 05:00 to 22:00. Private baths available (didn't take one). They stamp the 88 Onsen of Kyushu book. You need to bring your own soap/shampoo or buy it. Photo of the outdoor bath from the internet matches. Inside: two baths with clear water. The smaller bath at temperature around 42, the larger one at 41. Lots of steam inside but breathing is comfortable. Outside: main bath with clear water, temperature around 38-39. There's a cold bath. No view due to a tall fence, but it's cozy.