Want more inspiration? Browse our search results. . 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. Visitors are welcome to participate in costume and pose for photos by the castle. A Japanese-style Halloween event around Kakegawa Castle.