Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Awazu Onsen in Komatsu, Ishikawa prefecture, claims to be Japan's oldest onsen still in continuous use, with historical records documenting therapeutic bathing here since 717 AD during the Nara period — a span of over 1,300 years of unbroken Japanese thermal tradition. The chloride-rich sodium spring waters flow into ryokan baths in a traditional hot spring village retaining the intimate atmosphere of old Kaga province, in a region synonymous with refined Kaga cultural traditions including Kenroku-en garden, Kanazawa's Higashi Chaya geisha district, and the extraordinary lacquerware and gold leaf crafts of the Noto Peninsula. Soaking in waters that have welcomed Japanese bathers across thirteen centuries of history — from Nara-period monks to modern city dwellers — creates a direct sensory connection to the full arc of Japanese onsen culture.
Insider tip — Awazu Onsen claims to be Japan's oldest continuously operating hot spring, with documented records reaching back to 717 CE when the monk Taicho discovered the source at the foot of Mount Hakusan. The sodium-chloride water at 41°C is tapped by a handful of historic ryokan whose wooden buildings retain the atmosphere of Edo-period spa pilgrimage. The lone surviving 1200-year-old inn — Houshi — has remained in the same family for 46 generations and is a national cultural landmark.