Nunobiki Onsen Mimaki no Yu is a day-use onsen facility attached to the Michi-no-Eki Mimaki roadside station in Tomi City. You can enjoy a high-quality sodium chloride hot spring in an open-air bath with views of Mount Asama and a spacious glass-walled indoor bath. The sauna uses a Bona sauna with heaters built into the benches and walls; although it operates around 90°C, its high humidity makes it feel hotter and promotes abundant sweating. A cold plunge bath and outdoor rest benches are also well provided.