Sitting atop a rocky outcrop on Japan’s Izu Peninsula, the pool at Kuroneiwa-buro is so close to the Pacific that the waves are only just out of reach as they crash onto the boulders nearby. The hot ...

Billions of years ago, Earth’s atmosphere was hostile, with barely any oxygen and toxic conditions for life. Researchers from the Earth-Life Science Institute studied Japan’s iron-rich hot springs, ...

Japanese hot springs—better known as onsens—are prized for their zen experience, with travelers coming from around the world to lounge in natural pools and bliss out. The country is home to 27,000 ...