清川村ふれあいセンター 別所の湯

Bessho no Yu is a day-use bathhouse run by Kiyokawa village, tucked in the Tanzawa foothills near Miyagase. The water is plain heated groundwater rather than a hot spring, but the bath lineup runs bigger than the building suggests: an indoor tub, a hinoki bath, a cold plunge, a sauna, and a small rotenburo that looks out over the forest through the seasons. It also works as a village community hub, with a big tatami rest hall, two reservable tatami rooms, two karaoke rooms, and a restaurant for a meal after the bath. Reviewers describe it as unpretentious and quietly tattoo-friendly (staff may just ask you to declare any at the desk), more a stop for locals and passing campers than a destination bath.