According to "Azuma kagami" (The Mirror of the East), on June 23, casting was completed, and polishing was finished on June 23 according to "Todai-ji zokuyou roku" (A Sequel to the Digest Record of Todai-ji Temple).
『吾妻鏡』によれば、5月25日に鋳造は完了し、『東大寺続要録』によれば、6月1日に磨き終ったとする。