Sukumo Onsen Kochi

Sukumo, Kochi, Japan

Location: Sukumo, Kochi, Japan
Water type: sodium chloride
Temperature: 45 °C
pH: 7.3

Water profile

Thermicity

Sedative

45 °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

Sukumo Onsen is a coastal hot spring in Sukumo city at the southwestern corner of Kochi Prefecture, where the rugged Ashizuri-Uwakai National Park coastline meets the Pacific Ocean. The chloride-laden thermal waters, characteristic of seaside springs, are excellent for warming the body and nourishing the skin — a welcome comfort in the mild but maritime climate of this scenic coastal town. As a port city with strong ties to the sea and to the Shikoku Pilgrimage circuit, Sukumo offers bathers a unique blend of spiritual atmosphere and maritime charm.

Insider tip — Sukumo Onsen occupies the southernmost corner of Shikoku island, where Sukumo Bay opens onto the Bungo Channel and the warm Kuroshio Current moderates the climate year-round. The high-temperature sodium-chloride spring is attributed to marine sediments deep beneath the bay, and the intensity of the salt content makes it one of the more invigorating baths on the island. Cape Ashizuri, the southernmost point of Shikoku and a pilgrimage waypoint, is less than an hour's drive away and pairs perfectly with a recuperative soak.

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