Welcome to a place where the line between the living and the dead feels paper-thin. A place where mist clings to the rocky earth, the air stings with sulfur, and volcanic vents hiss like whispers from beneath the ground. This is Mount Osorezan, often translated as the “Mountain of Fear,” one of Japan’s most spiritual—and strangest—destinations.

In the heart of Nagano, where winter drapes the land in quiet white, lies a lake that carries a divine footprint—or at least, that’s what generations of believers have whispered. Every January or February, when the surface of Lake Suwa freezes just right, something extraordinary happens. Great cracks zigzag across the ice, rising like a frozen wave from shore to shore.