The Heian Onmyoji Who Commanded Spirits — The Legends and Truth of Abe no Seimei
Abe no Seimei was the supreme onmyoji (master of yin-yang divination) of mid-Heian Japan, trusted by the court to read fortunes from celestial signs. Wrapped in legends of commanding shikigami spirits, he was also a real, accomplished astronomer and calendar scholar.