Toriyama Sekien was an ukiyo-e artist of the mid-Edo period. He studied painting in the Kano school and is also known as the teacher of Kitagawa Utamaro.
Beginning with Gazu Hyakki Yagyo (The Illustrated Night Parade of a Hundred Demons) in 1776, his four illustrated books of yokai depicted creatures from folklore and classical literature across Japan one by one, each with its name. Much of how we picture yokai today, including the satori, tesso, ushi-oni, nure-onna and nurarihyon, comes from Sekien’s pictures, making him the founder of the yokai encyclopedia.