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
Trial Production of a FoldingRuler with <i>Bachiru</i> (Carved Stained Ivory) Design. 1901-2000. ColBase (National Museums of Japan).