Tsurayuki's Diary, also known as Tsurayuki nikki, is a classic work of Japanese literature written by Ki no Tsurayuki in the early 10th century. It is one of the earliest examples of a personal diary in Japan and provides insights into the life and culture of the Heian period. The diary combines poetry and prose, reflecting Tsurayuki's experiences, thoughts, and emotions. The text is notable for its detailed observations of nature, social interactions, and court life. It also includes a collection of waka poems, showcasing Tsurayuki's literary talent. Overall, the diary serves as an important historical document that highlights the aesthetics and values of its time.