Baron was an admiral in the

Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, Potsdam Declaration, when it was dissolved followin ...

and served twice as Minister of the Navy of Japan during the volatile 1930s.

Biography

Early life

Ōsumi was born in what is now the city of

Inazawa, Aichi is a city located in Aichi Prefecture, Japan. , the city had an estimated population of 135,580 in 54,999 households, and a population density of . The total area of the city was . Geography Inazawa is located in the flatlands of far western Aic ...

. He was a graduate of the 24th class of the

Imperial Japanese Naval Academy The was a school established to train line officers for the Imperial Japanese Navy. It was originally located in Nagasaki, moved to Yokohama in 1866, and was relocated to Tsukiji, Tokyo, in 1869. It moved to Etajima, Hiroshima, in 1888. Students ...

, where he placed 3rd out of 18 cadets. He served as

midshipman A midshipman is an officer of the lowest Military rank#Subordinate/student officer, rank in the Royal Navy, United States Navy, and many Commonwealth of Nations, Commonwealth navies. Commonwealth countries which use the rank include Royal Cana ...

on the

corvette A corvette is a small warship. It is traditionally the smallest class of vessel considered to be a proper (or " rated") warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the sloo ...

cruiser A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several operational roles from search-and-destroy to ocean escort to sea ...

and

battleship A battleship is a large, heavily naval armour, armored warship with a main battery consisting of large naval gun, guns, designed to serve as a capital ship. From their advent in the late 1880s, battleships were among the largest and most form ...

. After being commissioned as

ensign Ensign most often refers to: * Ensign (flag), a flag flown on a vessel to indicate nationality * Ensign (rank), a navy (and former army) officer rank Ensign or The Ensign may also refer to: Places * Ensign, Alberta, Alberta, Canada * Ensign, Ka ...

, he was assigned to the cruiser and then the cruiser on its voyage to

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

in 1899.

Naval career

After his return, Ōsumi was promoted to

lieutenant A lieutenant ( , ; abbreviated Lt., Lt, LT, Lieut and similar) is a Junior officer, junior commissioned officer rank in the armed forces of many nations, as well as fire services, emergency medical services, Security agency, security services ...

, and served as chief navigator on the cruisers and , and the patrol ship ''Manshu'' during the

Russo-Japanese War The Russo-Japanese War (8 February 1904 – 5 September 1905) was fought between the Russian Empire and the Empire of Japan over rival imperial ambitions in Manchuria and the Korean Empire. The major land battles of the war were fought on the ...

. While on ''Matsushima'', he participated in the

Battle of Port Arthur The of 8–9 February 1904 marked the commencement of the Russo-Japanese War. It began with a surprise night attack by a squadron of Imperial Japanese Navy, Japanese destroyers on the neutral country, neutral Imperial Russian Navy, Russian fl ...

and other combat engagements. He was awarded the

Order of the Golden Kite Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * ...

, 5th class on 1 April 1906. After the end of the war, Ōsumi returned to the

Naval War College The Naval War College (NWC or NAVWARCOL) is the staff college and "Home of Thought" for the United States Navy at Naval Station Newport in Newport, Rhode Island. The NWC educates and develops leaders, supports defining the future Navy and associa ...

, emerging as a lieutenant commander on 29 September 1906. After serving in a number of staff positions, Ōsumi was assigned as

naval attaché A navy, naval force, military maritime fleet, war navy, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations ...

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

from 27 January 1909 to 1 December 1911. On his return to Japan, Ōsumi was promoted to

commander Commander (commonly abbreviated as Cmdr.) is a common naval officer rank as well as a job title in many army, armies. Commander is also used as a rank or title in other formal organizations, including several police forces. In several countri ...

, and was assigned as aide-de-camp to

Fleet Admiral An admiral of the fleet or shortened to fleet admiral is a senior naval flag officer rank, usually equivalent to field marshal and marshal of the air force. An admiral of the fleet is typically senior to an admiral. It is also a generic ter ...

Tōgō Heihachirō , served as a '' gensui'' or admiral of the fleet in the Imperial Japanese Navy and became one of Japan's greatest naval heroes. As Commander-in-Chief of the Combined Fleet during the Russo-Japanese War of 1904–1905, he successfully confine ...

. He spent a year as

executive officer An executive officer is a person who is principally responsible for leading all or part of an organization, although the exact nature of the role varies depending on the organization. In many militaries and police forces, an executive officer ...

on the

battlecruiser The battlecruiser (also written as battle cruiser or battle-cruiser) was a type of capital ship of the first half of the 20th century. These were similar in displacement, armament and cost to battleships, but differed in form and balance of att ...

from 1913 to 1914, returning to staff positions until 1 December 1917, when he received his first command: the battleship . From 1 December 1918 – 1 July 1921, Ōsumi was appointed as military attaché to France. During that time, he was a participant in the Japanese delegation to the Versailles Peace Treaty negotiations. Also during this period, on 1 December 1920, he was promoted to

rear admiral Rear admiral is a flag officer rank used by English-speaking navies. In most European navies, the equivalent rank is called counter admiral. Rear admiral is usually immediately senior to commodore and immediately below vice admiral. It is ...

. After his return to Japan, Ōsumi served as Director of the Bureau of Naval Affairs in 1922, and was promoted to

vice admiral Vice admiral is a senior naval flag officer rank, usually equivalent to lieutenant general and air marshal. A vice admiral is typically senior to a rear admiral and junior to an admiral. Australia In the Royal Australian Navy, the rank of Vice ...

in 1924, Vice Minister of the Navy in 1925, commander-in-chief of the

IJN 2nd Fleet The was a fleet of the Imperial Japanese Navy (IJN) created as a mobile strike force in response to hostilities with Russia, and saw action in every IJN military operation until the end of World War II. History Established on 27 October 1903, ...

in 1928, and Commander in Chief of the

Yokosuka Naval District was the first of four main administrative districts of the pre-war Imperial Japanese Navy. Its territory included Tokyo Bay and the Pacific Ocean, Pacific coasts of central and northern Honshū from the Kii Peninsula to Shimokita Peninsula. Its h ...

in 1929. He was promoted to full

admiral Admiral is one of the highest ranks in many navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force. Admiral is ranked above vice admiral and below admiral of ...

on 1 April 1930. Ōsumi was a strong proponent of Japan's southward expansion, but refused to align himself with either the Treaty Faction or the Fleet Faction within the Navy. He was awarded the

Order of the Sacred Treasures The is a Japanese order, established on 4 January 1888 by Emperor Meiji as the Order of Meiji. Originally awarded in eight classes (from 8th to 1st, in ascending order of importance), since 2003 it has been awarded in six classes, the lowest tw ...

, 1st class on 14 May 1931.

Political career

Ōsumi served as Minister of the Navy from December 1931-May 1932, under the short-lived second cabinet of

Prime Minister A prime minister 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. A prime minister is not the head of state, but r ...

Wakatsuki Reijirō. His second term as Minister of the Navy was from January 1933-March 1936, during the cabinets of Prime Minister

Saitō Makoto Viscount (27 October 1858 – 26 February 1936) was a Japanese naval officer and politician. Nussbaum, Louis-Frédéric. (2005)"Saitō Makoto"in ''Japan Encyclopedia'', p. 809. Upon distinguishing himself during his command of two cruisers in t ...

and Keisuke Okada. Ōsumi, despite his reputation as a liberal, supported the decision to withdraw from the

League of Nations The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...

and also argued forcefully for higher naval appropriations budget and re-negotiation of the

Washington Naval Treaty The Washington Naval Treaty, also known as the Five-Power Treaty, was signed during 1922 among the major Allies of World War I, Allies of World War I, which agreed to prevent an arms race by limiting Navy, naval construction. It was negotiated at ...

. In a "guns and butter" debate, Ōsumi told Japanese legislators that it was incumbent to expand Japan's navy, and that "the whole Japanese nation must make up its mind to cope with the situation, even if we are reduced to eating rice gruel.". On 7 February 1934, he was awarded the

Order of the Rising Sun The is a Japanese honors system, Japanese order, established in 1875 by Emperor Meiji. The Order was the first national decoration awarded by the Japanese government, created on 10 April 1875 by decree of the Council of State. The badge feat ...

, 1st class. On 26 December 1935, he was ennobled with the title of

baron Baron is a rank of nobility or title of honour, often Hereditary title, hereditary, in various European countries, either current or historical. The female equivalent is baroness. Typically, the title denotes an aristocrat who ranks higher than ...

(''danshaku'') under the ''

kazoku The was the hereditary peerage of the Empire of Japan, which existed between 1869 and 1947. It was formed by merging the feudal lords (''Daimyo, daimyō'') and court nobles (''kuge'') into one system modelled after the British peerage. Distin ...

'' peerage system. During the attempted coup by a faction of the

Imperial Japanese Army The Imperial Japanese Army (IJA; , ''Dai-Nippon Teikoku Rikugun'', "Army of the Greater Japanese Empire") was the principal ground force of the Empire of Japan from 1871 to 1945. It played a central role in Japan’s rapid modernization during th ...

in February 1936 (the February 26 incident, Ōsumi's actions were remarkably ambiguous. Although the commander of the

Combined Fleet The was the main sea-going component of the Imperial Japanese Navy. Until 1933, the Combined Fleet was not a permanent organization, but a temporary force formed for the duration of a conflict or major naval maneuvers from various units norm ...

, Admiral Sankichi Takahashi ordered his battleships in

Tokyo Bay is a bay located in the southern Kantō region of Japan spanning the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture, on the southern coast of the island of Honshu. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel. Th ...

and targeted the rebel positions, and the commander of the

, Admiral

Shigeyoshi Inoue was an admiral in the Imperial Japanese Navy during World War II. He was commander of the Japanese 4th Fleet and later served as Vice-Minister of the Navy. A noted naval theorist, he was a strong advocate of naval aviation within the Japanese ...

organized a land force to march on Tokyo, Ōsumi refused to issue any orders or take any action, despite word that Prime Minister Okada Keisuke had survived the attack. After the suppression of the coup, Ōsumi resigned as Minister of the Navy, and served as Naval Councilor from 1936 onwards. In 1940, on the retirement of Prince Fushimi Hiroyasu, Ōsumi became the most senior admiral in the Imperial Japanese Navy; however, he was bypassed for promotion by Osami Nagano. Ōsumi was

killed in action Killed in action (KIA) is a casualty classification generally used by militaries to describe the deaths of their personnel at the hands of enemy or hostile forces at the moment of action. The United States Department of Defense, for example, ...

in the

Second Sino-Japanese War The Second Sino-Japanese War was fought between the Republic of China (1912–1949), Republic of China and the Empire of Japan between 1937 and 1945, following a period of war localized to Manchuria that started in 1931. It is considered part ...

during an inspection tour of the front lines on 5 February 1941, when his plane, an Imperial Japanese Airways transport, was shot down by Chinese guerrillas soon after takeoff from

Guangzhou Guangzhou, Chinese postal romanization, previously romanized as Canton or Kwangchow, is the Capital city, capital and largest city of Guangdong Provinces of China, province in South China, southern China. Located on the Pearl River about nor ...

on a flight towards Japanese-occupied

Hainan Hainan is an island provinces of China, province and the southernmost province of China. It consists of the eponymous Hainan Island and various smaller islands in the South China Sea under the province's administration. The name literally mean ...

."End of Osumi"
TIME Magazine, February 17, 1941 He was posthumously awarded the Order of the Rising Sun: Grand Cordon of the Paulownia Flowers. His grave is at the

Aoyama Cemetery is a cemetery in Aoyama, Tokyo, Aoyama, Minato, Tokyo, Minato, Tokyo, Japan, managed by the Tokyo Metropolitan Government. The cemetery is known for its cherry blossoms and is popular during the season of . History The cemetery was origin ...

Tokyo Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...

References

Books

* * *

External links

* * Time Magazine obit from 17 Feb 1941.

Notes

{{DEFAULTSORT:Osumi, Mineo 1876 births 1941 deaths People from Inazawa Japanese military personnel of the Russo-Japanese War Japanese admirals of World War II Imperial Japanese Navy personnel killed in World War II Kazoku Ministers of the Imperial Japanese Navy Japanese naval attachés Recipients of the Order of the Golden Kite Recipients of the Order of the Rising Sun with Paulownia Flowers Recipients of the Order of the Sacred Treasure, 1st class