Public domain
Tomo-mori Mitate Sanjurokkasen: Plum before the Battle, Kumagai Naomasa
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Credit line当盛見立三十六花撰 陣前の梅熊谷直実. 文久1. 豊国. National Diet Library, Japan. Public domain.