Kojijū (小侍従; 1121–1202) was a waka poet and Japanese noblewoman active in the late Heian period. She is designated a member of the Female Thirty-Six Immortals of Poetry (女房三十六歌仙, Nyōbō Sanjūrokkasen). She left a private collection of poems titled the Kojijū-shū.^[1]

In 1179, she became a Buddhist nun.