Jabarkan Perubahan zaman dari Bunroku

1592 : nama zaman diubah. Zaman sebelumnya berakhir

Cholmondeley, Lionel Berners. (1915). The History of the Bonin Islands from the Year 1827 to the Year 1876. London: Constable & Co. Ltd. OCLC 459257709

Nussbaum, Louis Frédéric and Käthe Roth. (2005). Japan Encyclopedia. Cambridge: Harvard University Press. 10-ISBN 0-674-01753-6; 13-ISBN 978-0-674-01753-5; OCLC 48943301

Sansom, George Bailey. (1958). A History of Japan, 10-ISBN 0-8047-0525-9/13-ISBN 978-0-8047-0525-7; 10-ISBN 0-8047-0524-0/13-ISBN 978-0-8047-0524-0; OCLC 16859819

Titsingh, Isaac. (1834). Nihon Odai Ichiran''; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691