The theory that says that it was a work by SUGAWARA no Takasue's daughter originates from a comment found in the postscript of Sarashina Nikki, a book of Imperial collection written by FUJIWARA no Sadaie, 'The diary of the daughter of SUGAWARA no Takasue, Governor of Hitachi Province, her mother was a daughter of Tomoyasu Ason (a high-ranking hereditary title), she was a daughter of Crown Prince's tutor's mother, Yowa no Nezame and Mitsu no Hamamatsu みつからくゆる あさくら なとは were written by the author of this diary.'
菅原孝標女の作であるとする説は、藤原定家筆御物本更級日記の奥書に「ひたちのかみすかはらのたかすゑ／のむすめの日記也　母倫寧朝臣女／傅のとののははうへのめひ也／よはのねさめ　みつのはままつ／みつからくゆる　あさくら　なとは／この日記の人のつくられたるとそ」という記述が見られるところから起ったものである。