Baron was a general in the

Imperial Japanese Army The was the official ground-based armed force of the Empire of Japan from 1868 to 1945. It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of the Army, both of which were nominally subordinate to the Emperor o ...

and Army Minister during

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

. His son, Hiroshi Ōshima was a

lieutenant general Lieutenant general (Lt Gen, LTG and similar) is a three-star military rank (NATO code OF-8) used in many countries. The rank traces its origins to the Middle Ages, where the title of lieutenant general was held by the second-in-command on the ...

in the Imperial Japanese Army, and served as Japanese ambassador to

Nazi Germany Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...

Biography

Ōshima was born in Iwamura Domain,

Mino Province was a province of Japan in the area of Japan that is today southern Gifu Prefecture. Mino was bordered by Ōmi to the west, Echizen and Hida to the north, and Shinano to the east, and Ise, Mikawa, and Owari to the south. Its abbreviat ...

(currently part of Ena City in Gifu Prefecture) as the son of a

samurai were the hereditary military nobility and officer caste of medieval and early-modern Japan from the late 12th century until their abolition in 1876. They were the well-paid retainers of the '' daimyo'' (the great feudal landholders). They h ...

household. He graduated from the 4th class of the

Imperial Japanese Army Academy The was the principal officer's training school for the Imperial Japanese Army. The programme consisted of a junior course for graduates of local army cadet schools and for those who had completed four years of middle school, and a senior course f ...

in 1881, where he specialized in

artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during siege ...

and was sent overseas as a military attaché and for studies to

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...

and

Prussia Prussia, , Old Prussian: ''Prūsa'' or ''Prūsija'' was a German state on the southeast coast of the Baltic Sea. It formed the German Empire under Prussian rule when it united the German states in 1871. It was ''de facto'' dissolved by an ...

from 1891 to 1893. Ōshima served on the staff of General

Yamagata Aritomo '' Gensui'' Prince , also known as Prince Yamagata Kyōsuke, was a senior-ranking Japanese military commander, twice-elected Prime Minister of Japan, and a leading member of the '' genrō'', an élite group of senior statesmen who dominated J ...

during the Japanese First Army in

First Sino-Japanese War The First Sino-Japanese War (25 July 1894 – 17 April 1895) was a conflict between China and Japan primarily over influence in Korea. After more than six months of unbroken successes by Japanese land and naval forces and the loss of the ...

. During the

Russo-Japanese War The Russo-Japanese War ( ja, 日露戦争, Nichiro sensō, Japanese-Russian War; russian: Ру́сско-япóнская войнá, Rússko-yapónskaya voyná) was fought between the Empire of Japan and the Russian Empire during 1904 and 1 ...

, he served on the Imperial General Headquarters, and after the war held various administrative and staff positions within the

Imperial Japanese Army General Staff The , also called the Army General Staff, was one of the two principal agencies charged with overseeing the Imperial Japanese Army. Role The was created in April 1872, along with the Navy Ministry, to replace the Ministry of Military Affairs ...

. He was promoted to

major general Major general (abbreviated MG, maj. gen. and similar) is a military rank used in many countries. It is derived from the older rank of sergeant major general. The disappearance of the "sergeant" in the title explains the apparent confusion of ...

in 1907 and to

in 1913. From 30 April 1916 to 29 September 1918, Ōshima was

Minister of War A defence minister or minister of defence is a cabinet official position in charge of a ministry of defense, which regulates the armed forces in sovereign states. The role of a defence minister varies considerably from country to country; in som ...

under

Prime Ministers A prime minister, premier or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. Under those systems, a prime minister is no ...

Ōkuma Shigenobu Marquess was a Japanese statesman and a prominent member of the Meiji oligarchy. He served as Prime Minister of the Empire of Japan in 1898 and from 1914 to 1916. Ōkuma was also an early advocate of Western science and culture in Japan, and ...

and

Terauchi Masatake Gensui Count Terauchi Masatake ( ja, 寺内正毅), GCB (5 February 1852 – 3 November 1919), was a Japanese military officer, proconsul and politician. He was a '' Gensui'' (or Marshal) in the Imperial Japanese Army and the Prime Minister o ...

. He entered the reserves in 1919 and served as a member of the House of Peers in the Diet of Japan from 1920. From 1940-1946, he was a member of the Privy Council. Ken'ichi Ōshima with Giichi Tanaka and Yūsaku Uehara

Ken'ichi Ōshima with Giichi Tanaka and Yūsaku Uehara

Decorations

* 1895 –

Order of the Sacred Treasure, 6th class * 1895 – JPN Kyokujitsu-sho 4Class BAR

Order of the Rising Sun, 4th class * 1895 – JPN Kinshi-kunsho 5Class BAR

Order of the Golden Kite The was an order of the Empire of Japan, established on 12 February 1890 by Emperor Meiji "in commemoration of Jimmu Tennō, the Romulus of Japan". It was officially abolished 1947 by the Supreme Commander for the Allied Powers (SCAP) during the ...

, 5th class * 1900 – JPN Zuiho-sho (WW2) 5Class BAR