Koshikibu no Naishi (小式部内侍, c. 999 – November 1025) was a Japanese waka poet of the early eleventh century.
[1][2][4][5] She was the daughter of Izumi Shikibu and Tachibana no Michisada (橘道貞),[1][2][3] the governor of Mutsu.
[1] Starting around 1009,[2] she joined her mother[2][3][4] in serving Empress Shōshi.
[1][2][3][4] A target of many suitors, she eventually married Fujiwara no Kiminari (藤原公成).
60 in Fujiwara no Teika's Ogura Hyakunin Isshu: Numerous anecdotes about her were incorporated into later treatises on poetry (歌論書, karonsho) and setsuwa collections.