Carpenter Dorr, Polmar Norman. Submarines of the Imperial Japanese Navy

London: Conway Maritime Press Ltd., 1986. — 188 p. — ISBN: 0851773966.Japanese interest in submarines began with the Russo-Japanese conflict of 1904-1905. Both Russia and Japan purchased submarines from the USA, but these small craft were not used in combat. Japan continued to purchase foreign-built submarines and designs, and the Imperial Japanese Navy subsequently initiated a most impressive program to develop submarines.