Nuruyu Onsen
微温湯温泉 旅館 二階堂ぬるまゆおんせん りょかん にかいどう
Day Use
YesClosed approximately late November to mid-April (due to snow accumulation).
Day-use bath 700 yen (recent price increase)
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Capabilities
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Policies & Services
Welcomes children and families
A day-use reviewer (Sep 2025) states a separate child price; hitou.or.jp's facility profile likewise lists a distinct children's day-use rate (200 yen, an older figure), corroborating that kids are accepted. The same Google review notes there is no waiting room, which the reviewer felt made the facility less convenient specifically for families with infants.
Restaurant or dining open to visitors (not just hotel meal plans)
Shower, wash stations, soap and shampoo provided
Relaxation space for after bathing
The official site lists a separate hourly 席料 (seat/rest fee) alongside the bathing fee for day visitors, implying a resting room is available for use.
On-site or nearby parking available
Highlights
Lukewarm BathPrograms
About
The name Nuruyu (微温湯) translates as "tepid water," and the spring lives up to it: the water runs unusually cool and clear, with a faint sulfur scent, flowing fresh in kakenagashi style. Indoor baths only, with separate facilities for men and women. The inn itself is a registered tangible cultural property, an old wooden building with sliding-door rooms at the end of a 6km mountain road. It belongs to the Nihon Hitou wo Mamoru Kai (日本秘湯を守る会), the association for Japan's secluded hot springs, and closes from late November through mid-April.
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Last updated July 22, 2026