Shimanto Yamamizuki
四万十山みず木しまんとやまみずき
Open-air and private baths overlooking the Shimanto River and Pacific coast
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Bathing Arrangements
A private bath you can reserve for yourself or your group
Shared bathing area for all genders
Policies & Services
A restaurant or dining room open to visitors, not only meals for overnight guests
On-site or nearby parking available
Views
Sea
RiverAbout
Shimanto Yamamizuki sits on a hillside above the southern tip of Shikoku, where the Shimanto River widens into the Pacific. The baths run on free-flowing source water (kakenagashi, 掛け流し): an open-air rotenburo (露天風呂) and bookable private baths in hinoki cypress and stone. From the water you look straight out over the river mouth and the coast. The facility is a glamping and cottage resort, so the onsen is for guests staying overnight.
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Last updated September 22, 2026