Sei Shōnagon
, also known as Shijō-dainagon, was a Japanese poet, admired by his contemporaries and a court bureaucrat of the Heian period. His father was the regent Fujiwara no Yoritada and his son Fujiwara no Sadayori. An exemplary calligrapher and poet, he is mentioned in works by Murasaki Shikibu, Sei Shōnagon and in a number of other major chronicles and texts.