Day Use
YesLast entry is 16:00, an hour before closing. The bath only operates in season, since access depends on when the mountain road opens each year, so it's worth calling ahead in early spring or late autumn.
Adult entry is 950 yen, which includes a 50 yen bathing tax.
Bathing & Water
Uses natural hot spring water
Site-wide policy states no added water/heat/recirculation/coloring/chlorine at any of the baths (source-fed).
Open-air outdoor bath
Enclosed indoor bathing area
Site itself names the facility a dedicated open-air bath (野天風呂), consistent with the review.
Capabilities
Shared bathing area for all genders
Facility has two separate entrances (source data lists 左側入り口/右側入り口 separately); no mixed-bathing statement for this facility, unlike the main lodge's 白滝の湯/不老泉/大浴場 which are explicitly konyoku.
Policies & Services
Restaurant or dining open to visitors (not just hotel meal plans)
Small food/drink stand for day-use visitors (coffee, light snacks); a reviewer also mentions soft-serve, drinks, curry rice and udon.
Shower, wash stations, soap and shampoo provided
On-site or nearby parking available
About
Yubara no Yu is a small day-use-only outdoor bath at the trailhead for climbing Mt. Tsubakuro (燕岳) in the Northern Alps, run by the Nakabusa Onsen lodge further up the mountain, which has its own separate baths for overnight guests. There's no indoor bath here, just open-air pools split into two sides rather than mixed bathing. The water comes from three different hot springs on the property, so its character shifts from pool to pool. A small stand by the baths sells coffee and simple food, and the washing area has shampoo and conditioner. It's a common stop for hikers washing off after coming down from the ridge.
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Last updated August 5, 2026