Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Odai Onsen is located in Nagoya, Aichi Prefecture, Japan's fourth-largest metropolitan area. Its thermal sodium-chloride water reaches 40°C, with an indoor bath, outdoor rotenburo and sauna.
Insider tip — Odai (大台) Onsen is in northern Nagoya — a city of extraordinary contradictions: Toyota's global automotive empire versus Japan's most pristine temperate rainforest (Odai-ga-hara, shared with Mie Prefecture); hyper-industrial efficiency versus the ancient ritual of Atsuta Shrine (which houses the Imperial Grass-Cutting Sword, one of Japan's three Imperial Treasures). The neighborhood sento remains central to Nagoya's daily life culture.