Osako Naoharu

Viscount , sometimes known as Ōsako Naotoshi, was a general in the early Imperial Japanese Army. He was the older brother of General Ōsako Naomichi.

Biography Ōsako was born as the eldest son to Ōsako Shinzō, a samurai of Satsuma Domain (present day Kagoshima Prefecture). He graduated from the domain's Soshikan academy, and fought as a Satsuma samurai during the Anglo-Satsuma War and the Boshin War. He joined the fledgling Imperial Japanese Army in March 1871, and was assigned to the Army Ministry from 1873 and promoted to captain in 1874. He was called to combat duty to fight against his fellow Satsuma clansmen in the Satsuma Rebellion, and was wounded during the siege of Kumamoto Castle. During the war, he was promoted to major and served on the staff of the Kumamoto Garrison. Promoted to major in June 1883, Ōsako became commander of the IJA 6th Infantry Regiment and from May 1885 was assigned command of the 1st Guards Regiment. Promoted to colonel in 1887, he was chief-of-staff of the IJA 4th Infantry Division from October 1890 and appointed head of the 1st Bureau of the Imperial Japanese Army General Staff Office the following year. In September 1892, Ōsako was promoted to major general, and given command of the IJA 5th Infantry Brigade.

Ōsako remained commander of the brigade throughout the First Sino-Japanese War, and was awarded after the war with elevation to the kazoku peerage with the title of baron (danshaku), He entered the reserves in April 1909 and retired from service in April 1914.

From November 1911, Ōsako replaced Nogi Maresuke as the principal of the Gakushūin Peer’s School, serving until August 1917.