Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Shin Matsunouchi Onsen is located in Matsubara, Osaka Prefecture. Sodium-chloride thermal water surfaces at 41°C, feeding an indoor bath, an outdoor rotenburo, and a sauna.
Insider tip — Matsubara lies along the ancient Takenouchi Kaido (竹内街道) — Japan's oldest nationally maintained road, established in 615 AD linking Naniwa (Osaka) to the Yamato region (Nara). The road passes through this historic corridor between modern cities; Shin Matsunouchi Onsen draws Osaka Basin thermal water for local residents in a city that sits at the crossroads of 1,400 years of Japanese history.