in the accessible kana and includes the word bushidō. Bushidō as a system of warrior values existed in multiple forms dating back to the medieval era. The unwritten form of bushidō first appeared with the rise of the samurai class and the shogun Minamoto no Yoritomo (1147–1199) in the 12th century. References Further reading Inazo Nitobe, Bushido: The Soul of Japan, Kodansha International, Tokyo, 2002. John W. Dower, War Without Mercy: Race & Power in the Pacific War, Pantheon Books, New York, 1986. External links Complete text of 13th edition online from Gutenberg 1899 non-fiction books Books about Japan Bushido Codes of conduct Eastern philosophical literature Ethics books Japanese books Modern philosophical literature Samurai Warrior code