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
《詞花和歌集抜書・後鳥羽院百首・順徳院百首・三躰和歌・定家難題百首》. . ColBase (National Museums of Japan).