Okada Gyokuzan, Morokoshi meishō zue, 1806 – The History of the Book in East Asia
長州藩 - Wikipedia,File:Modern Japan prefectures map in 1872.jpg - Wikipedia,Okada Gyokuzan, Morokoshi meishō zue, 1806 – The History of the Book in East Asia,Japanese History 202: The Turning Point at the End of Edo Period, the Satsuma-Choshu Alliance