990s

The 990s was a decade that began on 1 January 990 and ended on 31 December 999. It is distinct from the decade known as the 100th decade which began on January 1, 991 and ended on December 31, 1000.

Events
 Sei Shonagon writes The Pillow Book, a compilation of her daily observations, thoughts and feelings as an attendant to Empress Sadako in Japan's Imperial Court.