Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Funagata Wakaayu Onsen, part of the Seiryu Center in Funagata, Yamagata Prefecture, offers sodium-chloride water at 42°C. An indoor bath, an outdoor rotenburo pool and a sauna are available.
Insider tip — Wakaayu Onsen, the young sweetfish spring, serves Funagata-machi on the Mogami River where young ayu ascend from the sea each spring to feed in the clear highland shallows. The boat-shaped mountain profile that gives Funagata its name rises above the Mogami River valley, the historic waterway where timber and produce were floated from the Yamagata mountains to the Sakata Sea of Japan port in a commerce that Matsuo Basho documented in Oku no Hosomichi.