The book has about 320 entries. She also wrote lists in her diaries. There are about 164 lists. Some of the lists that were included in her diary were: "Depressing things" and "Things that arouse a fond memory of the past". Sei Shōnagon completed this book some time between 1000 and 1010 CE. Some people believe that a copy of Sei Shōnagon's book was given to Empress Sadako's daughter.