The image of the Kage-onna traces back to Sekien’s prints and has been understood as a “woman of shadow alone,” appearing where houses meet moon-cast light. In early modern homes, shoji and wooden doors let light pass, creating a boundary between outside brightness and interior dimness where a woman’s outline emerges. Lore says her visit is fleeting, more a portent of household unrest than a threat. Whether she is the shadow of the living or a trace of the dead is uncertain, and she is sometimes linked to family misfortune or the mood of the local deity. Proper conduct is to refrain from pursuit, lower the fire, close the doors, and speak no words. The next day, households often cleanse the well, garden trees, and crawlspace, seeking rites to calm the omen. The shadow makes no footsteps and shifts its shape in the wind. Dogs and cats are said to react keenly, yet harm is rarely told, and she seldom lingers.