Sailors in the Dragons Triangle had many things to fear and dread. Dark nights and stormy waters could summon the drowned spirits of the dead, or the ghost ships of old invaders. But it was clear skies and calm waters that brought the fear of the Umibōzu. Rising suddenly from the deep to break the placid surface of the water they came like a great ocean swell, a giant black head that would lurch upwards and capsize ships, sending sailors to the murky depths. Massive yokai, rising as much as twn meters tall, and strong enough to snap whaling ships in two.