The principal antagonist of the series.
~!Kyogokutei is a being who serves as the superior to the Ongyou as he provides them their targets and even commissioned Momosuke's death at first to cover their existence until he saw him to be of use to his scheme. Assuming the alias of feudal lord Danjo Kitabayashi, Kyogokutei commits many inhuman acts as part of an overall plan to cover the world in darkness with the Flame Lance cannon. He was ultimately defeated by the Ongyou devoured by the very darkness of everyone who he used and killed.!~

Tired of writing riddles for children, Yamaoka Momosuke plans on gathering spooky and gruesome stories and publishing them in an anthology called Hyakumonogatari ("One Hundred Tales"). While researching these old myths and legends he comes across a mysterious trio who call themselves the Ongyou. They are detectives who are investigating the legends to reveal their truths...and bring those in the wrong to justice. Each time Momosuke meets the Ongyou he must face horrible truths and battle with his morals, but he's seeing things he shouldn't be seeing...
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(Source: Anime News Network)

[Wiki (jp)](https://ja.wikipedia.org/wiki/京極夏彦) | [Wiki (en)](https://en.wikipedia.org/wiki/Natsuhiko_Kyogoku)

A Japanese mystery writer.

Kyougokutei