In Japanese legend, the time at five o'clock in the afternoon is generally known as The Witching Hour, but if you want to be more precise, The Witching Hour actually refers to the transition between day and night, which is twilight and dawn.
There are many legends about demons and monsters in Japan, and locals believe that daytime belongs to humans, while nighttime belongs to demons and monsters. When night and day alternate, and Yin and Yang overlap, those demons unseen during the day will appear.
These two periods are also the times when "seeing ghosts" is most likely.
However, at twilight, the demons and monsters are just getting ready to party, so the chances of "seeing ghosts" are much higher, while at dawn, the demons are busy returning home and preparing to disperse, so the likelihood of "seeing ghosts" is much lower.
