Rotenburo Mizusawa Onsen

Rotenburo Mizusawa Onsen is a hot spring bathhouse and self-catering lodge in the Mizusawa Onsen-kyo area of Tazawako, Semboku City, Akita Prefecture. It stands on high ground overlooking Lake Tazawa, along the bus route that runs from Tazawako Station toward the Nyuto Onsen area.

The water is a sulfur-bearing calcium-magnesium-sodium sulfate-chloride type (hydrogen sulfide type). The source temperature is 59 degrees Celsius and about 1,000 liters per minute flow out naturally. The water is milky white, and the outdoor baths are about one meter deep, so it comes up to your shoulders.

There are separate men's and women's areas, each with two indoor baths and two open-air baths. Day-use bathing runs from 10:00 to 20:00 (the building closes at 21:00) and costs 1,000 yen for adults, while elementary school children enter free. A large free rest hall and paid private rest rooms are available, with 60 free parking spaces. Guest rooms with self-cooking facilities are available for long-stay hot spring cures.