Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Tokiwa Yu is a thermal bathhouse in Ichikawa, Chiba prefecture, Japan, fed by sodium-chloride water at 41°C. It offers an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Ichikawa in Chiba prefecture is a dense suburban city on the eastern fringe of the Tokyo metropolitan area, separated from Tokyo proper by the Edo River. Tokiwa Yu is part of the Tokyo metropolitan sento tradition — where neighbourhood bathhouses continue to serve communities with heated mineral water even as private bathrooms became standard, preserving a social institution at the heart of Japanese urban culture that has endured without interruption since the Edo period.