Japan: From the Japanese Government History
“ Nothing was deemed of greater importance, politically and socially, than to preserve distinctions of birth. Throughout the Edo period the lines of demarcation were clearly and sharply maintained between the samurai, farmers, artisans, and merchants, the four classes ranking in the order here given. Kyōto was the place of residence of the imperial princes, among whom Fushimi, Arisugawa, Katsura, and Kan-in were most closely connected with the imperial house. ”
