だが、天暦5年（951年）10月、宮中の昭陽舎（梨壺）に撰和歌所が置かれ、その寄人に任命された源順・大中臣能宣・清原元輔・坂上望城・紀時文（以上、梨壺の五人）が中心となって『万葉集』の訓詁と新たな勅撰集の編纂に当たり、藤原伊尹が別当となってそれを統括した旨、史書に見えるので、遅くとも天暦末年には奏覧されたと見られる。

However, it seems to have been presented by 957, because a chronicle shows that the poetry bureau was established at Shoyosha (Nashitsubo, Ladies' Quarters) in the court in November 951 and that the five officers in Nashitsubo, MINAMOTO Shitago, ONAKATOMI no Yoshinobu, KIYOHARA no Motosuke, SAKANOUE no Mochiki, and KI no Tokibumi, carried out works deciphering the text of the "Manyoshu" (Collection of Ten Thousand Leaves) and compiling a new imperial collection of waka, and that, as the head of the poetry bureau, FUJIWARA no Koretada directed the compilation. - Wikipedia日英京都関連文書対訳コーパス