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Akō-Misaki Onsen

Ako, Hyogo, Japan
Akō-Misaki Onsen
Location
Ako, Hyogo, 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

Ako-Misaki Onsen rises on the cape at Ako in Hyogo Prefecture, the city immortalized in Japanese cultural consciousness by the Chushingura—the story of the 47 loyal ronin samurai who avenged their master's death in 1703 and were subsequently ordered to commit ritual suicide, creating the most celebrated story of samurai loyalty in the entire Japanese literary and dramatic tradition. The saline waters of this cape spring carry the mineral richness of the Seto Inland Sea coast, where ancient marine geology concentrates chloride minerals that warm and support the body with the lingering heat retention called yudamari, valued in Japanese coastal bathing tradition for sustained warmth after leaving the bath. Bathing at Ako's cape spring combines dramatic Seto Inland Sea maritime scenery with waters that connect, through the city's name, to the most famous act of samurai loyalty in all of Japanese history.

Insider tip — Ako-Misaki Onsen juts into the Harima Sea on Hyogo's southern coast, famous for its sweeping views of the Seto Inland Sea and the historic salt-producing heritage of Ako city. Saline waters closely mirror the nearby ocean chemistry, warming muscles and toning skin with natural sea minerals. Sunset views from the outdoor baths over the island-dotted sea are among the most scenic in western Honshu. The story of the 47 Ronin of Ako makes this a pilgrimage site for history enthusiasts.
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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).