Japan’s famed hot springs, or onsen, are full of invisible tripwires, from nudity to tattoos. A certified onsen sommelier shares advice on how to best enjoy the experience.

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 the next ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. We’ve pieced together a remarkably detailed timeline of ...