Ittan-momen is a ghost of white cloth, having the size of around ittan (about 10.6 meters in length and about 0.3 meter in width), and it flies in the night sky and will attack a person, they say.
約一反（長さ約10.6メートル、幅約30センチメートル）の白い布の姿の妖怪で、夜空を飛んで人を襲うという。