Dewaya
山菜料理 出羽屋
Mountain-vegetable cuisine inn with a marble bath of heated spring water
Bathing & Water
Heated tap water, not a natural hot spring
The bath uses heated mountain spring water, not onsen water.
Enclosed indoor bathing area
Bathing Arrangements
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
On-site or nearby parking available
About
Dewaya is an inn and restaurant built around sansai (山菜), wild mountain vegetables, and the Gassan soba served in its soba room, which also takes walk-in visitors. The bath is a marble one on the third floor. It is not onsen: the water is natural mountain water from Gassan, heated. Rooms are all tatami with futons laid out for the night, and there is free outdoor parking on both sides of the building.
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Last updated October 11, 2026