Tolong jelaskan mengenai Perubahan zaman dari Genna

Screech, Timon. (2006). Secret Memoirs of the Shoguns: Isaac Titsingh and Japan, 1779-1822. London: RoutledgeCurzon. 10-ISBN 0-203-09985-0, 13-ISBN 978-0-203-09985-8; OCLC 65177072

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 .