山鳥の森オートキャンプ場
Uses natural hot spring water
Open-air outdoor bath
Official site describes it only as 内湯・外湯 (indoor + outdoor bath); a Jan 2026 review names it explicitly as 露天風呂.
Enclosed indoor bathing area
Sauna room of any kind
Reservable private tent sauna (max 4 people, 2-hour slots), not a communal sauna room.
Cold water plunge bath, typically used after sauna
Cold-plunge tub is part of the tent-sauna cooldown options, alongside the river and a cold shower.
Shared bathing area for all genders
Site describes separate men's and women's baths (男女共に), implying no mixed bathing.
On-site or nearby parking available
Yamadorinomori is a small, family-run auto-campground in the hills of Minamioguni, Kumamoto. It has its own hot spring on the property, Yamadori-no-yu (山鳥の湯), with separate indoor and outdoor baths for men and women. There's also a reservable Finnish-style tent sauna for up to four people, with the river, a cold shower, or a cold-plunge tub to cool off between rounds (and snow, if there's any on the ground in winter). The campground has been run by the same family since 2000, and came back from flood damage in 2020 to reopen. It sits in the forest next to a river, which keeps things noticeably cooler in summer.
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Last updated July 30, 2026