Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Itoman Onsen serves Japan's southernmost city on Okinawa's main island, a proud fishing community whose brightly painted boats have worked the waters of the East China Sea and the Pacific for generations, landing catches that supply markets across the prefecture. The city is also home to the Okinawa Peace Memorial Park and Museum, built at the site of the Battle of Okinawa's final stand where some of the war's most intense combat claimed civilian and military lives alike. The onsen's geothermal warmth offers restoration in a city where the sea, the fishing tradition, and the deep memory of wartime suffering are woven inseparably into everyday life.
Insider tip — Itoman anchors the southern tip of Okinawa main island, a historically significant area where the Battle of Okinawa reached its devastating conclusion in June 1945, and the Peace Memorial Park and Himeyuri Monument stand as solemn reminders nearby. The onsen here offers visitors a quiet space for reflection after the emotionally heavy peace sites, its sodium-chloride water drawn from the coastal geothermal belt. Southern Okinawa's coastline around Itoman features some of the island's best snorkeling reefs, making the onsen doubly welcome after a day in the sea. The Itoman Fishing Port's fresh market is the ideal place to source ingredients for a picnic before or after bathing.
