Ariwara no Narihira was a Japanese courtier and waka poet of the early Heian period. He was named one of both the Six Poetic Geniuses and the Thirty-Six Poetic Geniuses, and one of his poems was included in the Ogura Hyakunin Isshu collection. He is also known as Zai Go-Chūjō, Zai Go, Zai Chūjō or Mukashi-Otoko.

Waka is a type of poetry in classical Japanese literature. Although waka in modern Japanese is written as 和歌, in the past it was also written as 倭歌, and a variant name is yamato-uta (大和歌).