Japan is home to 27,000 hot springs sources, but overtourism has reduced some of the country’s onsen water supply to a record ...

The massive influx of foreign tourists has proven to be more bane than boon for the Japanese onsen [hot spring] industry.

But not every pool of heated water qualifies as an onsen. Japan has strict laws governing one of the country’s most iconic activities, widely considered a natural treasure. Onsen water is heated ...