Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Minamisoma, on the Pacific coast of Fukushima Prefecture, is deeply associated with the ancient Soma Nomaoi festival, a UNESCO Intangible Cultural Heritage event in which hundreds of samurai-clad horsemen race across a beach in a stirring pageant that has continued for over a thousand years. Soma Onsen Fukushima taps chloride-rich coastal thermal waters, offering baths that relieve ocean fatigue and warm body and spirit in an area of remarkable cultural resilience and historic identity. The city's ongoing recovery and renewal following the 2011 earthquake and tsunami has become an inspiring story of community determination along the Tohoku Pacific coastline.
Insider tip — Soma Onsen faces the Pacific coast of northern Fukushima and draws sodium-chloride waters from deep marine sedimentary aquifers beneath the Abukuma plateau. The area is historically celebrated for the Soma Nomaoi wild-horse festival, one of Japan's most ancient samurai rituals held each July in full armour on the coastal plain. The thermal baths provide a quiet counterpoint to the festival excitement and are popular with horsemanship families for post-training recovery.