Included in "Senzai-wakashu" (Collection of a Thousand Years), one of the "Chokusen Wakashu" collection of waka compiled for the emperor, 'mutsu-no-kuni ni makarikeru toki, nakoso no seki nite hana no chiri kereba yomeru' (You can understand when you ride to Nakoso checkpoint in Mutsu Province and kick up scattered flowers).
勅撰和歌集の一つである『千載和歌集』に収録されており、「陸奥国にまかりける時、勿来の関にて花の散りければよめる」とある。