Hyakki Tsurezure Bukuro (百器徒然袋, "The Illustrated Bag of One Hundred Random Demons" or "A Horde of Haunted Housewares") is the fourth book in Japanese artist Toriyama Sekien's famous Gazu Hyakki Yagyō tetralogy.
This hints that the majority of the yōkai portrayed in its pages are of the variety known as tsukumogami, man-made objects taken sentient form.
Published in 1781, it was inspired in part by Tsurezuregusa (Tales in Idleness), a 14th-century essay collection by the monk Yoshida Kenkō.
Unlike previous books in the series, the majority of Hyakki Tsurezure Bukuro's yōkai appear to be of Sekien's own creation, based on turns of phrase or stories from Tsurezuregusa and other works of literature.
[2] The book is compiled in three sub-volumes: Jō, Chū, and Ge (literally "top", "middle", and "bottom", but generally translated as first, second, and third volume in English.)