Isaac Titsingh. (1834). Annales des empereurs du Japon (em francês) Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC5850691
Jien, The Future and the Past: A Translation and Study of the Gukanshō, an Interpretative History of Japan Written in 1219 (em inglês), University of California Press, 1979 p. 272 ISBN 9780520034600.
worldcat.org
Isaac Titsingh. (1834). Annales des empereurs du Japon (em francês) Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC5850691