Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Yamato Onsen is a conveniently located hot spring in Yamato city, a densely populated residential municipality in the central part of Kanagawa Prefecture situated between Yokohama and Sagamihara, notable as a key junction on the Sagami Railway connecting the Kanagawa interior to Tokyo and the coast. The bicarbonate thermal waters provide gentle relaxation and skin-softening benefits, serving the city's large suburban population with accessible thermal wellness. The onsen occupies a practical position within the dense Kanagawa urban fabric, offering the restorative benefits of mineral bathing to commuters and residents in one of the most densely populated areas of the greater Tokyo metropolitan region.
Insider tip — Yamato Onsen serves a densely populated commuter city bisected by the Sotetsu and Odakyu railway lines, where the sento functions as a genuine neighborhood anchor. The bicarbonate-rich thermal water is sourced from the deep Sagami Plain sedimentary aquifer, imparting a mild alkaline smoothness to the skin. Evening visits during weekday rush hour reveal the authentic rhythms of suburban Japanese bath culture.