Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Sarubino, in Iga, Mie Prefecture, a town known for its ninja history, uses sodium-chloride water at 41°C. Indoor bath, outdoor rotenburo and sauna round out the offering.
Insider tip — Sarubino at Oyamada Onsen serves Iga City, the birthplace of Japanese ninjutsu where the Iga-ryu school of ninja warfare established the most sophisticated espionage and guerrilla combat tradition in Japanese history. Iga is also the birthplace of Matsuo Basho (1644-1694), Japan greatest haiku poet, whose travels from Iga to the Deep North and Kyushu transformed the 17-syllable form into a literary medium of extraordinary emotional compression — a dual cultural heritage of secret arts and transparent poetry that gives this Mie mountain city its unique identity.