Ōyama Iwao

Junior First Rank
Marshal Prince
Ōyama Iwao
Junior First Rank; Marshal Prince Ōyama Iwao
大山巌
Lord Keeper of the Privy Seal
	In office; 23 April 1915 – 10 December 1916
Monarch	Taishō
Preceded by	Prince Fushimi Sadanaru
Succeeded by	Matsukata Masayoshi
Chief of the Imperial Japanese Army General Staff
	In office; 20 December 1905 – 11 April 1906
Monarch	Meiji
Preceded by	Yamagata Aritomo
Succeeded by	Kodama Gentarō
	In office; 16 May 1899 – 20 June 1904
Monarch	Meiji
Preceded by	Kawakami Soroku
Succeeded by	Yamagata Aritomo
	In office; 4 September 1882 – 13 February 1884
Monarch	Meiji
Preceded by	Yamagata Aritomo
Succeeded by	Yamagata Aritomo
Minister of the Army
	In office; 8 August 1892 – 20 September 1896
Prime Minister	Itō Hirobumi; Matsukata Masayoshi
Preceded by	Takashima Tomonosuke
Succeeded by	Takashima Tomonosuke
	In office; 22 December 1885 – 17 May 1891
Prime Minister	Itō Hirobumi; Kuroda Kiyotaka; Yamagata Aritomo; Matsukata Masayoshi
Preceded by	Office established
Succeeded by	Takashima Tomonosuke
Acting Minister of Education
	In office; 16 February 1889 – 22 March 1889
Prime Minister	Kuroda Kiyotaka
Preceded by	Mori Arinori
Succeeded by	Enomoto Takeaki
Member of the House of Peers
	In office; 5 August 1895 – 10 December 1916
Superintendent General of the Tokyo Metropolitan Police
	In office; 13 October 1879 – 14 January 1881
Personal details
Born	12 November 1842; Kagoshima, Satsuma, Japan
Died	10 December 1916 (aged 74); Jingūmae, Tokyo, Japan
Spouse	Yamakawa Sakiko (m. 1883)
Children	Kashiwa Ōyama
Awards	Collar of the Order of the Chrysanthemum; Grand Cordon of the Order of the Rising Sun with Paulownia Flowers; Order of the Golden Kite (1st class); Order of Merit;
Military service
Allegiance	Empire of Japan
Branch/service	Imperial Japanese Army
Years of service	1868–1914
Rank	Field Marshal
Battles/wars	Boshin War Battle of Utsunomiya Castle; Battle of Aizu; ; Satsuma Rebellion; First Sino-Japanese War Battle of Lüshunkou; Battle of Weihaiwei; Battle of Pyongyang; ; Russo-Japanese War Battle of Liaoyang; Battle of Shaho; Battle of Sandepu; Battle of Mukden; ;

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Prince Ōyama Iwao (大山巌; 12 November 1842 – 10 December 1916) was a Japanese field marshal, and one of the founders of the Imperial Japanese Army. He was representative of the outstanding military commanders of the late modern period.