磯原シーサイドホテル
Rooftop and seaside baths fed by the hotel's own hot spring
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Isohara Seaside Hotel sits on the Pacific coast in Kitaibaraki, with two baths drawing on its own natural hot spring. SORA, on the rooftop, opens onto open ocean and runs on a schedule that swaps between men's and women's hours through the day. NAMIMA is a windowed bath down at wave level, close enough to the shore to hear the surf. Rooms face the sea as well, and the older building keeps its worn-in, slightly retro character rather than having it polished away.
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Last updated September 29, 2026