Oyama Iwao (1842-1916) was born in Satsuma (now Kagoshima Prefecture). He studied gunnery at school and invented a gun that was called the Yasuke cannon. In 1871, after being promoted to the rank of major general, he went to France to study military methods. In the Russo-Japanese War of 1904-1905, he was a commander-in-chief of Japanese armies in Korea and Manchuria.
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Willard Dickerman Straight papers, #1260. Division of Rare and Manuscript Collections, Cornell University Library.
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