Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Ako, on the Harima coast of western Hyogo Prefecture, is eternally associated with the legendary story of the Forty-Seven Ronin, the masterless samurai who avenged their lord Asano Naganori's forced ritual suicide in 1703 after a confrontation at Edo Castle — a tale of samurai loyalty and sacrifice that has become the defining narrative of Japanese bushido ethics for over three centuries. Ako Onsen Hyogo draws on chloride-rich thermal waters from the marine geology of the Harima Sea coast, offering warming baths in a historic castle town whose deep cultural identity is inseparable from the Forty-Seven Ronin story celebrated each December in the Gishi Festival when costumed marchers commemorate the avengers' fateful procession to Edo. The Oishi Shrine dedicated to the ronin leader Oishi Kuranosuke, the Ako Castle ruins amid a garden of plum trees, and the traditional Ako natural sea salt produced by ancient evaporation methods — one of Japan's most prized artisan salts — make Ako a destination of unique historical and culinary depth.