also: まくらそうし
noun
private diary; pillow book
Archaic term for a personal diary or miscellany kept near the pillow, often containing reflections, anecdotes, and lists. The most famous example is Sei Shōnagon's 'The Pillow Book'.
清少納言の枕草紙は、平安時代の随筆として有名だ。
Sei Shōnagon's Pillow Book is famous as a Heian-period essay collection.
noun
book of erotic pictures
Historical use for a collection of erotic or pornographic illustrations, often kept discreetly.
江戸時代には、枕草紙と呼ばれる艶本が密かに流通していた。
During the Edo period, erotic books called 枕草紙 were secretly circulated.