758. Shimoyu, Zao Onsen, Yamagata ★★ An old-school onsen for ¥300. The stated hours are 06:00 to 22:00. No staff, no showers. Indoor bath. The water is clear and acidic, with a bluish tint, and there is lime scale on the bottom. Temperature is 44.5. It is easy to breathe inside, and in January it is cold. A strong old-school onsen, cold in winter, acidic water with no showers, hot water. Recommended for those who like a harsh atmosphere. 09.01.2026
Day Use
Yes06:00–22:00
¥300
Bathing & Water
Natural onsen water
Uses natural hot spring water
Indoor BathYes
Enclosed indoor bathing area
Policies & Services
WashingNo
Shower, wash stations, soap and shampoo provided
TowelsNo
Towels available to rent or borrow