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 [ change | change source ]

• 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.