Murasaki Shikibu
Shōnagon is also known for her rivalry with her contemporary, writer and court lady Murasaki Shikibu, author of "The Tale of Genji" who served the Empress Shoshi, second consort of the Emperor Ichijō. Murasaki Shikibu wrote about Shōnagon - somewhat scathingly, though conceding Shōnagon's literary gifts - in her diary, "The Murasaki Shikibu Diary".