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Wakayama Mihama Onsen

Mihama, Wakayama Prefecture, Kii Peninsula, Japan
Wakayama Mihama Onsen
Location
Mihama, Wakayama Prefecture, Kii Peninsula, Japan
Water type
sodium chloride
Temperature
40 °C
pH
7.3

Water profile

Thermicity
Sedative
40 °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

Mihama, in the central Wakayama Prefecture on the Kishima coast facing Osaka Bay, is a small fishing and resort community whose traditional Wakayama coastal lifestyle, the scenic Cape Murotsu headland, and the proximity to the popular Wakayama Marina City coastal resort complex create a modest but pleasantly maritime spa setting on the inner Kii Peninsula coast. Wakayama Mihama Onsen draws on chloride-rich coastal thermal waters from the marine geological formations of the central Wakayama Kishima coastline, providing warming maritime baths in a coastal community whose fishing tradition, bay scenery, and access to the Wakayama Marina City leisure complex create a straightforwardly pleasant coastal spa setting in central Wakayama. The Wakayama Marina City Portuguese-themed resort complex with its fresh seafood market and outlet shopping, the traditional Mihama fishing harbour fresh catch culture, and the coastal road cycling along the inner Kii Peninsula coastline toward Arida and Yuasa historic towns create a pleasantly coastal and accessibly recreational spa destination in central Wakayama Prefecture.

Insider tip — Mihama sits along the rugged Wakayama coast south of Arida, where the Kii Mountains plunge toward the Pacific and small fishing communities dot the indented shoreline. The onsen here draws sodium-chloride water from coastal bedrock, producing intensely warming baths popular with local fishermen after long days at sea. The drive south along Route 42 through this coastline offers dramatic ocean views that are among Kansai's most underappreciated scenery.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 40 °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).