In an article from after the battle dated April 11th of the same year (May 19, 1185), after a report on the number of Heishi soldiers killed and number of prisoners taken, it is recorded, "The 'naishidokoro' ('Yata no Kagami' - the eight-span mirror; one of the three Imperial regalia) and the 'shinji' ('Yasakani no magatama' - the grand jewel; one of the three Imperial regalia) were found, but the sacred sword (Amakumo no Tsurugi) was lost."
また戦いの後の元暦二年四月十一日の条に戦いでの平氏方の戦死者、捕虜の報告に続いて「内侍所（八咫鏡）と神璽（八尺瓊勾玉）は御座すが、宝剣（天叢雲剣）は紛失」と記されている。