Koyasu Nobushige (1880), Buke kazoku meiyoden vol. 1 (Tokyo: Koyasu Nobushige), p. 25. (Accessed from National Diet LibraryArchived 2010-02-11 at the Wayback Machine, 17 July 2008)
nhk.or.jp
www3.nhk.or.jp
火山活動の津波 過去に県内でも [Volcanic and tsunami activity in Aomori Prefecture's past]. NHK Aomori (in Japanese). 26 December 2018. Retrieved 26 December 2018.
Koyasu Nobushige (1880), Buke kazoku meiyoden vol. 1 (Tokyo: Koyasu Nobushige), p. 25. (Accessed from National Diet LibraryArchived 2010-02-11 at the Wayback Machine, 17 July 2008)