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 備前国住長船祐光 次男左京進宗光作 文明九年二月 日. . ColBase (National Museums of Japan).