Zao Onsen Zenshichi-no-yu
蔵王温泉 善七乃湯ざおうおんせん ぜんしちのゆ
Private open-air baths and mixed bathing on a sulfur spring in Zao Onsen
Day Use
YesThe bath closes from 19:30 to 21:00 while it switches between the men's and women's sides.
Day bathing costs 1,000 yen per person, tax included.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
This sauna is booked separately from the main baths.
Bathing Arrangements
A private bath you can reserve for yourself or your group
Shared bathing area for all genders
A bathing garment (yuami-gi, 湯浴み着) or swimsuit is required.
Policies & Services
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
On-site or nearby parking available
Views
MountainsPrograms
About
The spring at Zao is among the most acidic in Japan: the water sits around pH 1.3 to 1.6, and it turns a striking milky bluish-white as it hits the air. Zenshichi-no-yu draws directly from this source with 100% kakenagashi (free-flow, no recycling). The main bath is mixed (konyoku) for most of the day, with women-only hours in the afternoon (3-6pm) and swimsuits required outside those hours. There are also private baths for those who want them. The inn sits in Zao Onsen village, one of the major onsen resort areas in the Tohoku region, with a long history going back to a legendary spring discovery around 110 CE.
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