Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Yoshida sits along the southern flank of Shizuoka Prefecture, where the foothills of the Southern Alps give way to the coastal plain bordering Suruga Bay. The onsen here offers bicarbonate water at 40 °C, with an alkaline pH of 8, producing that characteristic soft, almost frictionless sensation on the skin that defines this water type within the Japanese bathing tradition. Against the backdrop of Shizuoka's tea-covered hills and the distant silhouette of Mount Fuji on clear days, Yoshida Onsen represents the quieter, more contemplative side of thermal bathing in a prefecture famous for its natural bounty.
Insider tip — Yoshida-cho sits near the mouth of the Oi River on Suruga Bay in eastern Shizuoka, a quiet coastal town with tuna fishing and light industry. The local onsen taps bicarbonate-rich thermal water from the coastal aquifer, delivering smooth, skin-softening baths to a predominantly local clientele. On clear days the broad beach and bay views extend to the Izu Peninsula, with Mt. Fuji occasionally visible to the north on winter mornings.
