Gazu Hyakki Yakō (画図百鬼夜行, "The Illustrated Night Parade of A Hundred Demons") is the first book of Japanese artist Toriyama Sekien's famous Gazu Hyakki Yakō series, published ca. 1781. These books are supernatural bestiaries, collections of ghosts, spirits, spooks and monsters, many of which Toriyama based on literature, folklore, other artwork. These works have had a profound influence on subsequent yōkai imagery in Japan.