In the poem Meiyo Kasensha in the Waka Iroha collection, it was recorded "Zoki hoshi (priest Zoki), private collection, called himself Ionushi. Same name in the era of the Emperor Uda, Palace priest of Teiji-in."
また『和歌色葉』の「名誉歌仙者」には、「後拾詞花増基法師家集号廬主。宇多御時同名、亭子院殿上法師」（増基法師家集廬主と号す。宇田の御時に同名、亭子院の殿上法師）とある。