Onsen are baths filled with geothermally heated, mineral-rich water. They’ve long been part of Japanese culture, but foreign travelers often struggle with the nudity aspect. - Boaz Rottem/Alamy Stock ...

This undated photo provided by Stéphanie Crohin shows traditional baths and murals in Kasuga onsen, or hot spring bath, in Matsuzaka, Mie prefecture, Japan. Japan is proud of its bathing traditions.

(CNN) — It was a cold February day in northern Japan, snow piled high outside the onsen locker room windows as I slipped out of my clothes. Nervously, I stepped into the plumes of steam wafting from ...