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Susaki Onsen

Susaki, Kochi, Shikoku, Japan
Susaki Onsen
Location
Susaki, Kochi, Shikoku, Japan
Water type
sodium chloride
Temperature
41 °C
pH
7.3

Water profile

Thermicity
Sedative
41 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Restorative
LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy
Effortless float
LowHigh

Dense, salty water — you float without effort.

SodiumChloruresBrome

Susaki Onsen is found in Susaki, a Pacific coast city in central Kochi Prefecture whose harbor faces the full force of the Pacific Ocean swells and whose fishing community has sustained itself on the rich marine resources of the Kuroshio Current that sweeps this coast, bringing warm tropical waters and the abundant marine life that makes Kochi Prefecture one of Japan's premier fishing prefectures. Susaki holds the somber distinction of being the last confirmed sighting location of the Japanese river otter (Nihon Kawauso) — a Japanese river otter was observed here in 1979, and when no subsequent confirmed sightings occurred, the species was officially declared extinct in 2012, making Susaki an unexpected memorial to the loss of one of Japan's most beloved native mammals. The city's fishing traditions, its Pacific coastal scenery of dramatic headlands and sheltered bays, and this poignant connection to Japan's recent extinction history create a layered and affecting atmosphere for visitors who come to experience the coastal character of central Kochi. The onsen here provide silica-rich mineral bathing beside the Pacific in a fishing community of genuinely raw coastal vitality.

Insider tip — Susaki Onsen lies along the Pacific-facing coast of Kochi Prefecture, where the warm Kuroshio current moderates the climate and draws bonito fishing fleets throughout the year. The sodium-chloride waters echo the coastal environment, carrying a mild oceanic salinity that soothes sun-weathered skin after days on Kochi's dramatic cape scenery. Susaki is also famed as the last known habitat of the Japanese river otter, now extinct, lending a bittersweet ecological poignancy to visits here.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).