Hyakki Yako. In this concept EP, five. . About this album In Japanese folklore, "Hyakki Yako (百鬼夜行, ひゃっきやぎょう) " means "Night Parade of One Hundred Demons". Inspirational designs, illustrations, and graphic elements from the world's best designers. A Japanese-style Halloween event around Kakegawa Castle. Visitors are welcome to participate in costume and pose for photos by the castle. Want more inspiration? Browse our search results.