Mitsumasa Yonai
Encyclopedia
was an admiral
Admiral
Admiral is the rank, or part of the name of the ranks, of the highest naval officers. It is usually considered a full admiral and above vice admiral and below admiral of the fleet . It is usually abbreviated to "Adm" or "ADM"...

 in the Imperial Japanese Navy
Imperial Japanese Navy
The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

, and politician
Politician
A politician, political leader, or political figure is an individual who is involved in influencing public policy and decision making...

. He was the 37th Prime Minister of Japan
Prime Minister of Japan
The is the head of government of Japan. He is appointed by the Emperor of Japan after being designated by the Diet from among its members, and must enjoy the confidence of the House of Representatives to remain in office...

 from 16 January to 22 July 1940.

Early life & Naval career

Yonai was born in Morioka
Morioka, Iwate
is the capital city of Iwate Prefecture, Japan.As of 2005, the city has an estimated population of 300,740 and a population density of 588.11 persons per km². The total area is 489.15 km²....

 city, Iwate Prefecture
Iwate Prefecture
is the second largest prefecture of Japan after Hokkaido. It is located in the Tōhoku region of Honshū island and contains the island's easternmost point. The capital is Morioka. Iwate has the lowest population density of any prefecture outside Hokkaido...

 as the first son of an ex-samurai
Samurai
is the term for the military nobility of pre-industrial Japan. According to translator William Scott Wilson: "In Chinese, the character 侍 was originally a verb meaning to wait upon or accompany a person in the upper ranks of society, and this is also true of the original term in Japanese, saburau...

retainer of the Nambu clan of the Morioka Domain
Morioka Domain
The was a han or feudal domain that encompasses present-day the middle-northern part of Iwate Prefecture and eastern part of Aomori Prefecture. It is sometimes colloquially called . The domain was tozama daimyo and was governed by the Satake clan. Its income was 100,000...

. He graduated from the 29th class Imperial Japanese Naval Academy
Imperial Japanese Naval Academy
The was a school established to train officers for the Imperial Japanese Navy. It originally located in Nagasaki, moved to Yokohama in 1866, and was relocated to Tsukiji, Tokyo in 1869. It moved to Etajima, Hiroshima in 1888...

 in 1901, ranked 68 of 115 cadets. After midshipman
Midshipman
A midshipman is an officer cadet, or a commissioned officer of the lowest rank, in the Royal Navy, United States Navy, and many Commonwealth navies. Commonwealth countries which use the rank include Australia, New Zealand, South Africa, India, Pakistan, Singapore, Sri Lanka and Kenya...

 service in the corvette
Corvette
A corvette is a small, maneuverable, lightly armed warship, originally smaller than a frigate and larger than a coastal patrol craft or fast attack craft , although many recent designs resemble frigates in size and role...

 , and cruiser
Cruiser
A cruiser is a type of warship. The term has been in use for several hundreds of years, and has had different meanings throughout this period...

  he was commissioned as ensign
Ensign (rank)
Ensign is a junior rank of a commissioned officer in the armed forces of some countries, normally in the infantry or navy. As the junior officer in an infantry regiment was traditionally the carrier of the ensign flag, the rank itself acquired the name....

 in January 1903. He served in administrative positions until near the end of the Russo-Japanese War
Russo-Japanese War
The Russo-Japanese War was "the first great war of the 20th century." It grew out of rival imperial ambitions of the Russian Empire and Japanese Empire over Manchuria and Korea...

 of 1904-1905, when he went to sea again on the destroyer
Destroyer
In naval terminology, a destroyer is a fast and maneuverable yet long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller, powerful, short-range attackers. Destroyers, originally called torpedo-boat destroyers in 1892, evolved from...

  and the cruiser .

After the war, he served as chief gunnery officer on the cruiser , battleship
Battleship
A battleship is a large armored warship with a main battery consisting of heavy caliber guns. Battleships were larger, better armed and armored than cruisers and destroyers. As the largest armed ships in a fleet, battleships were used to attain command of the sea and represented the apex of a...

 , and cruiser .

After his promotion to lieutenant commander
Lieutenant Commander
Lieutenant Commander is a commissioned officer rank in many navies. The rank is superior to a lieutenant and subordinate to a commander...

 in December 1912, he graduated from the Naval War College
Naval War College (Japan)
The was the staff college of the Imperial Japanese Navy, responsible for training officers for command positions either on warships, or in staff roles....

 and was assigned as naval attaché to Russia during the height of World War I, from 1915-1917.

While overseas, he was promoted to commander
Commander
Commander is a naval rank which is also sometimes used as a military title depending on the individual customs of a given military service. Commander is also used as a rank or title in some organizations outside of the armed forces, particularly in police and law enforcement.-Commander as a naval...

; after the collapse of the Russian Empire
Russian Empire
The Russian Empire was a state that existed from 1721 until the Russian Revolution of 1917. It was the successor to the Tsardom of Russia and the predecessor of the Soviet Union...

, he was recalled to Japan and later became executive officer
Executive officer
An executive officer is generally a person responsible for running an organization, although the exact nature of the role varies depending on the organization.-Administrative law:...

 on the battleship .

He rose to the rank of captain
Captain (naval)
Captain is the name most often given in English-speaking navies to the rank corresponding to command of the largest ships. The NATO rank code is OF-5, equivalent to an army full colonel....

 in December 1920 and was subsequently sent as naval attaché to Poland from 1921-1922.

On his return to Japan, he was captain of the cruisers (from 1922–1923) and Iwate (1923–1924), and battleships (in 1924) and (from 1924–1925). Yonai was promoted to rear admiral
Rear Admiral
Rear admiral is a naval commissioned officer rank above that of a commodore and captain, and below that of a vice admiral. It is generally regarded as the lowest of the "admiral" ranks, which are also sometimes referred to as "flag officers" or "flag ranks"...

 on December 1, 1925.

He became Chief of the 3rd Section of the Imperial Japanese Navy General Staff
Imperial Japanese Navy General Staff
The was the highest organ within the Imperial Japanese Navy. In charge of planning and operations, it was headed by an Admiral headquartered in Tokyo.-History:...

 in December 1926. Within the Navy General Staff, he served on the Technical Council of the Navy Technical Department.

He was appointed Commander-in-Chief
Commander-in-Chief
A commander-in-chief is the commander of a nation's military forces or significant element of those forces. In the latter case, the force element may be defined as those forces within a particular region or those forces which are associated by function. As a practical term it refers to the military...

 of the First Expeditionary Fleet, sent to the Yangtze River
Yangtze River
The Yangtze, Yangzi or Cháng Jiāng is the longest river in Asia, and the third-longest in the world. It flows for from the glaciers on the Tibetan Plateau in Qinghai eastward across southwest, central and eastern China before emptying into the East China Sea at Shanghai. It is also one of the...

 in China in December 1928. Following the success of this mission, he was promoted to vice-admiral in December 1930 and placed in command of the Chinkai Guard District
Chinkai Guard District
The was the major navy base for the Imperial Japanese Navy in Korea under Japanese rule before and during World War II. Located in southern Korea , the Chinkai Guard District was responsible for control of the strategic Straits of Shimonoseki and for patrols along the Korean coastline and in the...

, in Korea
Korea under Japanese rule
Korea was under Japanese rule as part of Japan's 35-year imperialist expansion . Japanese rule ended in 1945 shortly after the Japanese defeat in World War II....

.

Yonai was given command of the IJN 3rd Fleet
IJN 3rd Fleet
The was a fleet of the Imperial Japanese Navy, which was created on six separate occasions.-Russo-Japanese War:First established on 28 December 1903, the IJN 3rd Fleet was created by the Imperial General Headquarters as an administrative unit to manage various vessels considered too obsolete for...

 in December 1932, following which he again commanded the Sasebo Naval District
Sasebo Naval District
was the third of five main administrative districts of the pre-war Imperial Japanese Navy. Its territory included the western and southern coastline of Kyūshū, the Ryukyu Islands, Taiwan and Korea, as well as patrols in the East China Sea and the Pacific...

 (November 1933), IJN 2nd Fleet
IJN 2nd Fleet
The was a fleet of the Imperial Japanese Navy.-History:First established on 28 December 1903, the IJN 2nd Fleet was created by the Imperial General Headquarters as a mobile strike force of cruisers and destroyers to pursue the Imperial Russian Navy's Vladivostok-based cruiser squadron while the...

 (November 1934) and Yokosuka Naval District
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 coasts of central and northern Honshū from the Kii Peninsula to Shimokita Peninsula.-History:...

 (December 1935) before receiving appointment as Commander-in-Chief
Commander-in-Chief
A commander-in-chief is the commander of a nation's military forces or significant element of those forces. In the latter case, the force element may be defined as those forces within a particular region or those forces which are associated by function. As a practical term it refers to the military...

 of the Combined Fleet
Combined Fleet
The was the main ocean-going component of the Imperial Japanese Navy. The Combined Fleet was not a standing force, but a temporary force formed for the duration of a conflict or major naval maneuvers from various units normally under separate commands in peacetime....

 and concurrently the IJN 1st Fleet
IJN 1st Fleet
The was the main battleship fleet of the Imperial Japanese Navy.-History:First established on 28 December 1903, the IJN 1st Fleet was created during the Russo-Japanese War when the Imperial General Headquarters divided the Readiness Fleet into a mobile strike force of cruisers and destroyers to...

 in December 1936.

While in command at Sasebo, the Japanese Navy was shaken by the "Tomozuru Incident", when it was determined that the basic design of the Chidori-class torpedo boats
Japanese torpedo boat Tomozuru
was one of four s of the Imperial Japanese Navy. She capsized in a storm on March 12, 1934, shortly after her completion. This incident forced the IJN to review the stability of all recently completed, under construction and planned ships. She was salvaged and put back into service after extensive...

 was flawed, thus calling into question the basic designs of many of the warships in the Japanese navy.

While in command at Yokosuka, the February 26 Incident
February 26 Incident
The was an attempted coup d'état in Japan, from February 26 to 29, 1936 carried out by 1,483 troops of the Imperial Japanese Army. Several leading politicians were killed and the center of Tokyo was briefly occupied by the rebelling troops...

 erupted in Tokyo. Yonai was visiting his mistress in Shimbashi the night the attempted coup d'état
Coup d'état
A coup d'état state, literally: strike/blow of state)—also known as a coup, putsch, and overthrow—is the sudden, extrajudicial deposition of a government, usually by a small group of the existing state establishment—typically the military—to replace the deposed government with another body; either...

began, only a couple of blocks away, but knew nothing of the situation until he returned to base the following morning.

Naval Minister

Yonai became full admiral
Admiral
Admiral is the rank, or part of the name of the ranks, of the highest naval officers. It is usually considered a full admiral and above vice admiral and below admiral of the fleet . It is usually abbreviated to "Adm" or "ADM"...

 in April 1937 and Navy Minister
Ministry of the Navy of Japan
The was a cabinet-level ministry in the Empire of Japan charged with the administrative affairs of the Imperial Japanese Navy . It existed from 1872 to 1945.-History:...

 in the cabinet of Prime Minister
Prime Minister of Japan
The is the head of government of Japan. He is appointed by the Emperor of Japan after being designated by the Diet from among its members, and must enjoy the confidence of the House of Representatives to remain in office...

 Senjūrō Hayashi
Senjuro Hayashi
was an Imperial Japanese Army commander of the Chosen Army of Japan in Korea during the Mukden Incident and the invasion of Manchuria, and a Japanese politician and the 33rd Prime Minister of Japan from February 2, 1937 to June 4, 1937.-Biography:...

 in 1937. He served in the same position under the subsequent first Fumimaro Konoe
Fumimaro Konoe
Prince was a politician in the Empire of Japan who served as the 34th, 38th and 39th Prime Minister of Japan and founder/leader of the Taisei Yokusankai.- Early life :...

 and Kiichirō Hiranuma administrations, through August 1939.

After Nobuyuki Abe became Prime Minister, Yonai remained on the Supreme War Council
Supreme War Council (Japan)
The Supreme War Council was established during the development of representative government in Meiji period Japan to further strengthen the authority of the state. Its first leader was Yamagata Aritomo , a Chōshū native who has been credited with the founding of the modern Japanese army and was to...

. While Navy Minister, Yonai was known as a man of few words. His speeches tended to be short, and were delivered in his almost indecipherable Nambu accent. Written records of his speeches are only about half the length of his contemporaries.

As Navy Minister, Yonai was alarmed by the growing tension between Japan and Great Britain and the United States, at a time when the bulk of the Imperial Japanese Army
Imperial Japanese Army
-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...

 was tied down in an apparently unending quagmire in China. His efforts to promote peace made him unpopular with ultranationalist extremists, and (as with Admiral Isoroku Yamamoto
Isoroku Yamamoto
was a Japanese Naval Marshal General and the commander-in-chief of the Combined Fleet during World War II, a graduate of the Imperial Japanese Naval Academy and a student of Harvard University ....

), he was the target of several assassination attempts. However, Yonai supported the construction of the s in an effort to maintain a military balance with the world's other two naval superpowers.

Prime Minister of Japan

Yonai was appointed Prime Minister of Japan
Prime Minister of Japan
The is the head of government of Japan. He is appointed by the Emperor of Japan after being designated by the Diet from among its members, and must enjoy the confidence of the House of Representatives to remain in office...

 from 6 January 1940, largely with the backing of Emperor Hirohito. As Prime Minister, he continued the strong pro-British, pro-American stance he held as Navy Minister and continued his strong opposition to the Tripartite Pact
Tripartite Pact
The Tripartite Pact, also the Three-Power Pact, Axis Pact, Three-way Pact or Tripartite Treaty was a pact signed in Berlin, Germany on September 27, 1940, which established the Axis Powers of World War II...

 with Nazi Germany
Nazi Germany
Nazi Germany , also known as the Third Reich , but officially called German Reich from 1933 to 1943 and Greater German Reich from 26 June 1943 onward, is the name commonly used to refer to the state of Germany from 1933 to 1945, when it was a totalitarian dictatorship ruled by...

 and fascist Italy
Kingdom of Italy (1861–1946)
The Kingdom of Italy was a state forged in 1861 by the unification of Italy under the influence of the Kingdom of Sardinia, which was its legal predecessor state...

.

Following the German occupation of the Low Countries and France in May-June 1940, the Imperial Japanese Army began to show dissatisfaction with Yonai's anti German policy. The disagreement became apparent in early July 1940, as Minister of War Shunroku Hata began to criticize the Prime Minister openly. Yonai was forced to resign on 21 July 1940, largely due to pressure from the pro-Axis Imperial Japanese Army]. The Tripartite Pact was signed on 27 September 1940.

Subsequent political activity

Yonai served as Deputy Prime Minister
Deputy Prime Minister
A deputy prime minister or vice prime minister is, in some counties, a government minister who can take the position of acting prime minister when the prime minister is temporarily absent. The position is often likened to that of a vice president, but is significantly different, though both...

 and concurrently as Navy Minister again under the cabinet of Prime Minister Kuniaki Koiso
Kuniaki Koiso
- Notes :...

 from 22 July 1944, during which time he returned to the active duty roster from the reserve list. By this time, Saipan
Saipan
Saipan is the largest island of the United States Commonwealth of the Northern Mariana Islands , a chain of 15 tropical islands belonging to the Marianas archipelago in the western Pacific Ocean with a total area of . The 2000 census population was 62,392...

 had fallen to the Allies
Allies of World War II
The Allies of World War II were the countries that opposed the Axis powers during the Second World War . Former Axis states contributing to the Allied victory are not considered Allied states...

.

Yonai remained Navy Minister under the administration of Prime Minister Kantarō Suzuki
Kantaro Suzuki
Baron was an admiral in the Imperial Japanese Navy, member and final leader of the Taisei Yokusankai and 42nd Prime Minister of Japan from 7 April-17 August 1945.-Early life:...

. In the last few weeks before Japan's surrender, he sided with Prime Minister Suzuki and Foreign Minister Shigenori Tōgō
Shigenori Togo
was Minister of Foreign Affairs for the Empire of Japan at both the start and the end of the Japanese-American conflict during World War II...

 in support of acceptance of the Potsdam Declaration
Potsdam Declaration
The Potsdam Declaration or the Proclamation Defining Terms for Japanese Surrender is a statement calling for the Surrender of Japan in World War II. On July 26, 1945, United States President Harry S...

 in opposition to Minister of War
Ministry of War of Japan
The , more popularly known as the Ministry of War of Japan, was cabinet-level ministry in the Empire of Japan charged with the administrative affairs of the Imperial Japanese Army...

 Korechika Anami, Chief of Naval General Staff Admiral Soemu Toyoda and Chief of the Army General Staff General Yoshijirō Umezu.

Yonai remained Navy Minister in the cabinets of Prime Minister HIH Higashikuni Naruhiko and Prime Minister Kijūrō Shidehara
Kijuro Shidehara
Baron was a prominent pre–World War II Japanese diplomat and the 44th Prime Minister of Japan from 9 October 1945 to 22 May 1946. He was a leading proponent of pacifism in Japan before and after World War II, and was also the last Japanese prime minister who was a member of the kazoku...

 from August 1945, during which time he presided over the final dissolution of the Imperial Japanese Navy.

He played a major role during the International Military Tribunal for the Far East
International Military Tribunal for the Far East
The International Military Tribunal for the Far East , also known as the Tokyo Trials, the Tokyo War Crimes Tribunal, or simply the Tribunal, was convened on April 29, 1946, to try the leaders of the Empire of Japan for three types of crimes: "Class A" crimes were reserved for those who...

 in working with the major defendants, such as Hideki Tōjō
Hideki Tōjō
Hideki Tōjō was a general of the Imperial Japanese Army , the leader of the Taisei Yokusankai, and the 40th Prime Minister of Japan during most of World War II, from 17 October 1941 to 22 July 1944...

, to coordinate their testimonies so that Emperor Hirohito would be spared from indictment. According to his interpreter Suichi Mizota, in March 1946 Bonner Fellers
Bonner Fellers
Bonner Frank Fellers , was a U.S. Army officer who served during World War II as military attaché and psychological warfare director. He was a considered a protégé of General Douglas MacArthur.-World War II:...

 asked him to make Tōjō bear all responsibility for the Greater East Asia War  After the war, Yonai devoted rest of his life to help to rebuild devastated Japan.

Yonai suffered from high blood pressure most of his life, but he died of pneumonia
Pneumonia
Pneumonia is an inflammatory condition of the lung—especially affecting the microscopic air sacs —associated with fever, chest symptoms, and a lack of air space on a chest X-ray. Pneumonia is typically caused by an infection but there are a number of other causes...

 in 1948 at the age of 68. His grave is located at the temple of Enko-ji in his hometown of Morioka.

His honors include the Order of the Golden Kite
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."-Background:...

 (first class) and the Grand Cordon of the Order of the Rising Sun
Order of the Rising Sun
The is a Japanese order, established in 1875 by Emperor Meiji of Japan. The Order was the first national decoration awarded by the Japanese Government, created on April 10, 1875 by decree of the Council of State. The badge features rays of sunlight from the rising sun...

.

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