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Béasley, W.G. (1963). The Making of Modern Japan. London: Weidenfeld and Nicolson.

Borton, Hugh (1955). Japan's Modern Century. New York: The Ronald Press Company.

Idditti, Smimasa. Life of Marquis Shigenobu Okuma: A Maker of New Japan. Kegan Paul International Ltd. (2006). ISBN 0-7103-1186-9

Idditti, Junesay. Marquis Shigenobu Okuma - A Biographical Study in the Rise of Democratic Japan. Hokuseido Press (1956). ASIN: B000IPQ4VQ

Lebra-Chapman, Joyce. Okuma Shigenobu: statesman of Meiji Japan. Australian National University Press (1973). ISBN 0-7081-0400-2

Oka Yoshitake, et al. Five Political Leaders of Modern Japan: Ito Hirobumi, Okuma Shigenobu, Hara Takashi, Inukai Tsuyoshi, and Saionji Kimmochi. University of Tokyo Press (1984). ISBN 0-86008-379-9

Tokugawa Munefusa (2005). Tokugawa yonbyakunen no naisho-banashi: raibaru bushō-hen Tokyo: Bungei-shunju