The waters here carry radon — not in trace amounts, but in concentrations among the highest in the prefecture. First discovered during the Kanbun era of the early Edo period, the springs drew their name from the nearby Shichisha Hachimangu shrine and served as a place of healing along the Asahi River. Then, as often happens in Japan, the waters receded from public life. By the end of the Meiji period, the onsen had largely faded. It was rediscovered in 1899, lost again to uncertainty, secured anew in 1964, and joined by a second source — Shin-Yahata Onsen — in 1982. There is something in this rhythm of forgetting and remembering that feels honest, as if the place exists not for attention but simply because the water continues to rise.

Takebe Hachiman Onsen, the main facility, feeds its baths directly from the source — kakenagashi, the water always flowing, always replaced. The Asahi River runs alongside, and the old post town of Fukuwatari lends its particular quiet to the setting. From JR Fukuwatari Station, the walk takes fifteen or twenty minutes, long enough to notice the riverbank, the unhurried scale of things. A cultural center nearby uses the abundant hot water for a swimming pool, which says something about the sheer volume of what comes up from below. There is also a small freshwater aquarium devoted to the creatures of the Asahi River — medaka, river fish, the modest fauna of this particular stretch of water.

To stay here for several nights would be to settle into a kind of plainness. The river would become familiar. The baths, fed continuously from the earth, would become routine in the best sense — something the body begins to expect rather than anticipate. The town does not perform for visitors; it carries on. Yogurt is made from local milk. The water flows. One might, after a few days, stop noticing the quiet, which is precisely when a place like this begins to do its work.