"Yu-no-sato is a small public onsen in Unzen that’s regarded as the oldest communal bath in the area. In addition to the heritage, people come here for the healing benefits that come from the hot, acidic, iron-rich hot springs. Watanabe warns that the heat can be intense, so it’s important to practice kakeyu (using buckets full of water outside the tub) before fully immersing yourself and soaking for no more than five minutes at first." - Travel + Leisure Editors