Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Oiso, on the Sagami Bay coast of Kanagawa Prefecture between Hiratsuka and Odawara, is one of the most historically distinguished resort communities in the greater Tokyo region, its nineteenth-century villas having hosted five Japanese Prime Ministers including Ito Hirobumi and Yamagata Aritomo who retreated here to escape the capital's pressures. Oimachi Onsen Kanagawa draws on chloride-rich coastal thermal waters from the marine geological formations of the Sagami Bay coast, offering warming maritime baths in a resort community whose distinguished political and intellectual heritage, the pine-forested coastline, and the traditional Horaiji beach culture create an appealingly historic spa setting. The Oiso Prime Minister's Villa memorial park, the Yoshida Shigeru Memorial Museum honouring the postwar Prime Minister whose Oiso residence was the setting for many crucial postwar policy decisions, and the traditional Sagami Bay coastal scenery make Oiso a remarkably historically rich coastal thermal destination in western Kanagawa Prefecture.