Hyakki Yako. Visitors are welcome to participate in costume and pose for photos by the castle. Inspirational designs, illustrations, and graphic elements from the world's best designers. . In this concept EP, five. Want more inspiration? Browse our search results. A Japanese-style Halloween event around Kakegawa Castle. 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".