Nobusuma

In Japan if a bat can manage to live for a verylong time it will become a vampiric creature called a nobusuma ("most ancient"). This ENERGY VAMPIRE flies through the night sky looking for a sleeping person to assault. When it finds suitable prey, the nobusuma lands on his chest and begins to tap on the sleeping person's chest, making him cough. When this happens, the nobusuma will take in the escaping breath, leaching off some of the person's life. Over the course of the next three days, unless the nobusuma is stopped, the victim will die, his life energy drained away. To prevent this from happening, all that has to happen is for someone to witness an attack taking place. This will drive the vampire off, never to return. The victim will instantly recover fully and go on to live a long and healthy life.

Source: Iinkai, Japan, 794; Japan Society of London, Transactions and Proceedings, vol. 9, 27­28; Poulton, Spirits of Another Sort, 64