In fact, together with a shusho mokkan (a wooden tablet used for writing practice) unearthed from the ruins of Kannonji in Tokushima Prefecture, likely a product of the seventh century, and which had 'Naniwa-tsu ni Sakuya kono hana' (奈尓波ツ尓昨久矢己乃波奈, On the Beach of Naniwa, the flowers bloom) written upon it in Manyo-gana (a syllabary used in the Manyoshu [Collection of Ten Thousand Leaves]), many wooden tablets with this poem written on it have been unearthed from ruins all over the country.
実際に徳島県の観音寺遺跡から、万葉仮名で「奈尓波ツ尓昨久矢己乃波奈」と記された7世紀のものとみられる習書木簡が出土しているのをはじめ、各地から数多くこの歌を記した木簡が出土している。