Sei Shōnagon (c. 966–1025) served as a lady-in-waiting to Empress Teishi (Sadako), consort of Emperor Ichijō. Her masterwork, The Pillow Book (Makura no Sōshi), opens with the celebrated ‘In spring, the dawn’ passage and captures court life, nature, and human behavior through the aesthetic concept of ‘okashi’ (bright, witty delight). This stands in contrast to Murasaki Shikibu’s ‘mono no aware’ (a gentle, poignant sensitivity). Sei Shōnagon immortalized Empress Teishi’s beauty and intelligence in her writing, even as political power shifted to Fujiwara no Michinaga. Today, Sennyu-ji temple in Kyoto connects visitors to the world of Heian court culture she so vividly described.