Toby RP (1977). "Reopening the Question of Sakoku: Diplomacy in the Legitimation of the Tokugawa Bakufu". Journal of Japanese Studies. 3 (2): 323–63. doi:10.2307/132115. JSTOR132115.
Toby RP (1977). "Reopening the Question of Sakoku: Diplomacy in the Legitimation of the Tokugawa Bakufu". Journal of Japanese Studies. 3 (2): 323–63. doi:10.2307/132115. JSTOR132115.