Seionsou
清温荘せいおんそう
Public hot spring lodge with outdoor baths overlooking Lake Gosho
Day Use
YesIrregular closures per the operating calendar; during peak periods such as New Year, Golden Week, and Obon (Aug 8-18), the breakfast buffet and evening return plans are not available. The calendar is subject to change based on availability (calling ahead is recommended).
Adults (junior high and above) ¥800, children (ages 3 to elementary school) ¥450. Sunday morning bath + breakfast buffet plan: adults ¥2,000. On cleaning day, day use starts from 16:00.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Bathing Arrangements
A private bath you can reserve for yourself or your group
Shared bathing area for all genders
Policies & Services
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
Views
Lake
MountainsAbout
Seionsou is a public lodge in Tsunagi Onsen (繋温泉) run by a local government employees' mutual aid association. The baths are separated by gender and include an indoor pool and an open-air bath (rotenburo) with views over Lake Gosho (御所湖) and, on clear days, Mt. Iwate (岩手山). The water is a clear, faintly sulfurous spring that leaves the skin feeling smooth. A sauna and cold bath are also on site. Day use is available, and the lodge runs a morning bath on weekends. A longtime local favorite, it draws regulars who value the low-key atmosphere and honest pricing.
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Last updated September 19, 2026