Shodoshima Onsen

Shodoshima, Kagawa, Japan

Location: Shodoshima, Kagawa, 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

Shodoshima Onsen is the collective name for six distinct hot spring sources scattered across the scenic island of Shodoshima in Kagawa Prefecture in the Seto Inland Sea, with each source bearing its own name: Olivean no Yu, Shio no Yu, Olive Onsen, San-Olive Onsen, Yumoto Olive Onsen, and Rie Onsen. The iodine-rich waters of this island thermal complex are inseparable from Shodoshima's identity as Japan's foremost olive-producing island, lending a distinctive coastal and agricultural character that sets this group of springs apart from mainland onsen destinations. Visitors bathing on Shodoshima enjoy panoramic views of the Seto Inland Sea against a backdrop of ancient olive groves and the gentle rhythms of island life.

Insider tip — Shodoshima Onsen graces the olive-covered slopes of Shodoshima island in the Seto Inland Sea, where iodine-rich saline waters emerge near the shore. Bathing in the concentrated brine leaves skin deeply hydrated and warm, ideal after cycling the island's coastal roads through groves of imported olive trees. The island's unhurried Mediterranean atmosphere sets it apart from mainland Japan, and small family bathhouses maintain an artisanal charm. Sunset views over the calm sea from outdoor pools are among the finest in western Japan.

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