March 11, One Year On: Radium Hot Springs Still in Demand – Japan Real Time – WSJ.

By Eleanor Warnock

Baths known as “radium hot springs” have existed in Japan for hundreds of years, their owners proclaiming the virtues of lightly radioactive radon gas as a way to clear skin, restore youth, and even, incongruous as it may sound, cure cancer.

(read more at the link above).