The Yōkai of Toriyama Sekien
Several creatures now treated as ancient Japanese folklore were invented by Sekien himself and simply presented as traditional. A twentieth-century manga artist's adaptations later fixed the now-familiar modern images of many of them.
Toriyama Sekien, Gazu Hyakki Yagyō and its sequels (1776–1784); Mizuki Shigeru's manga adaptations from 1959
The first illustrated printed encyclopaedia of Japanese folklore spirits, published in 1776, that shaped how yōkai are imagined to this day.