Noboribetsu Grand Hotel (登別グランドホテル)

Founded in 1938 and known as "the Guest House in Noboribetsu" for hosting the Showa Emperor. Features 3 distinct spring types — sulfur, iron, and salt — all under one roof. The signature dome-shaped Roman bath is iconic, while the outdoor bath overlooking Japanese gardens provides a serene experience. Day-use bathing available for ¥2,000.

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