According to wikipedia: A very similar urban legend concerns another girl, Kashima Reiko, who died on the train tracks and lost her legs. Kashima Reiko appears to be an abbreviation of Kamen Shinin Ma (Mask, dead person demon). Kashima haunts bathroom stalls and will ask the occupant where her legs are. If the occupant answers incorrectly, she will rip their legs off. To be saved, they must tell her that her legs are at the Meishin Railway and answer Kashima Reiko if she asks who told them this. Sometimes she will ask people what her name is, which is a trick question. Answering "Kashima Reiko" will result in her attacking them. The correct answer is "Mask Death Demon", derived from the meaning of her name. In one area of Japan, a statue of rice straw called Kashima-sama was made in order to protect the village from bad influence, and seems that residents call its name in order to expulse of an evil spirit. However, when it was transmitted to other areas,"-sama" changed into "-san" and it seems that it was mistaken as an evil spirit name of female or a wounded soldier who worshiped the Kashima Shrine.