1. Suwa daimyōjin ekotoba (1356). National Institute of Japanese Literature, Tachikawa City, Tokyo. http://kotenseki.nijl.ac.jp/biblio/100128671
2. “ōsei fukko ni yoru tennō shihai tō fukoku no ken” (c. 8th month, 1868). Item 1 in “Kisoku kakidome,” A4/330. Archives of Hokkaido, Sapporo.