Serialized on Weekly Young Jump from 1986-1989, total 17 volumes. Peacock King is Ogino's first manga, and it is considered to be his best work too. Peacock King is written with overwhelming knowledge of mythology and religion from all over the world. Almost every stories has a mythology or religion background. When reading this manga, religion/mythology background is required for full enjoyment of this manga.
The main character Kujaku (孔雀) is a Buddhist monk who specialize in exorcism, devil hunting. He is a member of Ura-Kouya, a secret organization in Japan that specialize in demon hunting.