Official Tourism Website of Mount Fuji in Yamanashi Prefecture "Home of Mt.Fuji, Yamanashi" > Hot Spring Resorts > Masutomi Hot Spring Resort
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Masutomi Hot Spring Resort is famous for its high content of radium. There are three ways to take in the springs: bathing in the water, drinking the water, or inhaling the steam. Legend says that Lord Shingen happened to discover this spring when he was excavating a gold mine.
Contents: Radium 97o F

Hokuto City, Division of Tourism, Commerce, and Industry
TEL: 0551-42-1351
http://www.city.hokuto.yamanashi.jp/hokuto_cms/html/joy-sutama/15088964606.html( External link )