18-9 Hoshino, Naruko Onsen, Osaki, Miyagi Prefecture
Rating
Cost per person
¥500
Located in Naruko Onsen, Osaki City, Miyagi Prefecture, Shintoro Hot Spring (Shintoro no Yu) is easily accessible from both Furukawa (via the Naruko Ohashi Bridge) and Mogami Town, Yamagata Prefecture. This hot spring is known for its skin-smoothing waters, sourced from a naturally heated spring (93°C) cooled via wooden troughs. Open year-round, from 9:00 to 21:30, the facility offers a single indoor bath with a notably slippery, alkaline quality. The entrance fee is ¥440. Visit during off-peak hours on weekdays for a more relaxed experience.