Daini no Sanmi

 was a Japanese "waka" poet of the mid-Heian period.
Biography.
She was the daughter of Murasaki Shikibu and . Her given name was , although the kanji can also be read as Kenshi.
She was married to and produced son in 1038, and she has a daughter with in 1026. She also served as the nurse of Emperor Go-Reizei.
Poetry.
Thirty-seven or thirty-eight of her poems were included in imperial anthologies from the "Goshūi Wakashū" onward.
One of her poems was included as the fifty-eighth in the "Ogura Hyakunin Isshu":
She also produced a private collection called the .
Possible partial authorship of "The Tale of Genji".
Some scholars have attributed the final ten chapters of her mother's magnum opus, "The Tale of Genji", to her, although this theory is generally rejected by the majority of scholars.