However, "yūrei" differ from traditional "bakemono" due to their temporal specificity. The "yūrei" is one of the only creatures in Japanese mythology to have a preferred haunting time (midtime of the hours of the Ox; around 2:00 am–2:30 am, when the veils between the world of the dead and the world of the living are at their thinnest). By comparison, normal "obake" could strike at any time, often darkening or changing their surroundings should they feel the need. Similarly, "yūrei" are more bound to specific locations of haunting than the average "bakemono," which are free to haunt any place without being bound to it.""