Abe no Seimei was a legendary figure in Japanese folklore, often depicted as a skilled onmyoji, or practitioner of onmyodo, a traditional Japanese esoteric cosmology. He is believed to have lived during the Heian period (794-1185) and is renowned for his abilities in divination, exorcism, and the manipulation of spirits. His character has been popularized in various forms of media, including literature, anime, and film. Seimei is often associated with the Yin-Yang philosophy and is said to have served the imperial court, using his powers to protect the nation from malevolent forces. His legacy continues to influence Japanese culture, symbolizing wisdom and the balance between the natural and supernatural worlds.