Sei Shōnagon
was a Heian period "waka poet" and Japanese nobleman. His daughter was the Heian poet and author Sei Shōnagon, famous today for writing "The Pillow Book". He is designated a member of the Thirty-six Poetry Immortals, and one of his poems is included in the famous "Ogura Hyakunin Isshu". His court career included terms as governor of Kawachi Province and Higo Province.