I am savouring 'The Pillow Book' (枕草子 Makura no Sōshi) by Sei Shōnagon, a court lady to Empress Teishi during the 990s and early 1000s in Heian Japan. The imperial palace at that time was located in Heian-kyō (present-day Kyoto). In it, she records her observations and musings, including lists of all types, personal thoughts, interesting events in court, poetry and some opinions on her contemporaries. She completed the book in the year 1002.
As the precursor of the zuihitsu, it is an important literary and historical reference.
[Wikipedia]