In addition to the above, other Important Cultural Properties include a sword with an inscription of 'Hisakuni' in Itsukushima-jinja Shrine and another sword with an inscription of 'Hisakuni' in Nikko Tosho-gu Shrine; however, they were made by someone other than Hisakuni AWATAGUCHI.
重要文化財指定物件では上記のほか、厳島神社に「久国」銘の太刀、日光東照宮に「久国」銘の剣があるが、粟田口久国とは別人の作である。