Public domain
[Hizō Ki, Shishō, etc., and Paper-Backed Kōn Reki and Kana Reki Fragments] [2]
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Credit line[秘蔵記私鈔等並に紙背具注暦・仮名暦断簡] [2]. [南北朝-室町時代] [写]. National Diet Library, Japan. Public domain.