License, verbatimCC-BY
ColBase (National Institutes for Cultural Heritage, Japan): image published under Creative Commons Attribution 4.0 (CC BY 4.0), stated as schema:license on the item's own access record in Japan Search. Attribution required; terms: https://colbase.nich.go.jp/pages/term?locale=en
短刀 銘春日大明神奉実近安芸国住 明徳二二年八月日(棟二)光世作. . ColBase (National Museums of Japan).