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Born to asamurai family in theChōshū Domain, Tanaka became an officer in theImperial Japanese Army and rose through the ranks. He served as Minister of the Army under Prime MinistersHara Takashi andYamamoto Gonnohyōe. After retiring from active duty he accepted the presidency of theRikken Seiyūkai, a major conservative party. Following the resignation of theWakatsuki Cabinet in 1927, Tanaka was appointed Prime Minister. In foreign affairs, he pursued a hawkish policy; in domestic affairs, he sought to suppress communist and socialist movements. Criticised for his handling of the unauthorisedassassination of Zhang Zuolin by aKwangtung Army officer, he resigned in 1929 and died soon afterwards.
Tanaka was born as the third son of a low-rankingsamurai family in the service ofChōshū Domain inHagi,Nagato Province (modern dayYamaguchi Prefecture), Japan. At the age of 13, he participated in theHagi Rebellion. He had an interest in politics from an early age, serving on a village council and as an elementary school teacher. He only joined the Imperial Japanese Army at the age of 20.
He graduated from the former 8th class ofImperial Japanese Army Academy and the 8th class of theArmy War College in 1892, and served as a junior officer during theFirst Sino-Japanese War. After the end of the war, he was sent as amilitary attaché to Moscow andPetrograd, and was inRussia at the same time asTakeo Hirose of theImperial Japanese Navy, with whom he became close friends. Tanaka was fluent in theRussian language, which he learned while attending mass every Sunday at aRussian Orthodox church, which enabled him to practice his Russian at church social events, although it is uncertain if he ever actually converted to Christianity. As one of the few Russian experts within the military, he was an invaluable resource to Army planners during theRusso-Japanese War, and served as aide to GeneralKodama Gentarō inManchuria.
Tanaka (left) walking with GeneralsŌshima Ken'ichi (center) and Uehara (right), 1918
In 1910, he established a Veterans Association. Tanaka was promoted tomajor general in 1911, and was made director of the Military Affairs Bureau at theMinistry of the Army, where he recommended an increase in the strength of the standing army by two additionalinfantry divisions. He was awarded theOrder of the Sacred Treasure (1st class) in September 1918. He joined the cabinet ofPrime MinistersHara Takashi asArmy Minister from September 1918 to June 1921. He was promoted to full general in 1920 and was awarded theOrder of the Rising Sun (1st class). He was also elevated to the title ofdanshaku (baron) under thekazoku peerage system. However, the Hara cabinet came under unceasing criticism due to theNishihara Loans, the disastrousNikolayevsk incident and accusations of Army misappropriation of secret funds, and supporting unsavory figures such asWhite Movement generalRoman von Ungern-Sternberg. After suffering from an attack ofangina, Tanaka resigned all posts, and retired to his summer home inOiso, Kanagawa.
Tanaka returned as Army Minister in the 2ndYamamoto administration from September 1923 to January 1924. After retiring from the army, Tanaka was invited to accept the post of party president of theRikken Seiyūkai political party in 1925 and was made a member of theHouse of Peers in January 1926. He had been scheduled to be promoted to the rank ofField Marshal at the time of his retirement. However, when news reached the ears of the Army Ministry of a 3 million Yen bonus that Tanaka received on agreeing to join theRikken Seiyukai, the promotion was denied.
On the domestic front, Tanaka attempted to suppress communists and socialists and their sympathizers through widespread arrests (the15 March incident of 1928, and the19 April incident of 1929).
On foreign policy, Tanaka differed from his predecessor Shidehara both tactically and strategically. Whereas Shidehara preferred to evacuate Japanese residents where conflicts occurred with local people, Tanaka preferred using military force. While Shidehara theoretically respected China's sovereignty, Tanaka openly pursued a "separation of Manchuria and Inner Mongolia policy" (満蒙分離政策,Man-Mō bunri seisaku) tocreate a sense of difference between those areas and the rest of China.[1] On three separate occasions in 1927 and 1928 he sent troops to intervene militarily inShandong Province to blockChiang Kai-shek'sNorthern Expedition to unify China underKuomintang rule, in what became known as theJinan Incident.
Tanaka came into office even as forces were already beginning to converge that would draw Japan intoWorld War II. In 1928, however, the machinations of the ultranationalist secret societies and theKwantung Army resulted in a crisis: theassassination of the Manchurian warlordZhang Zuolin and the failed attempt to seizeManchuria. Tanaka himself was taken by surprise by the assassination plot and argued that the officers responsible should be publiclycourt-martialed for homicide. The military establishment, from which Tanaka was by now estranged, insisted on covering up the facts of the incident, which remained an official secret. Bereft of support, and under mounting criticism in theDiet and even from emperorHirohito himself, Tanaka and his cabinet resigned en masse on 2 July 1929.
In 1929, China accused Tanaka of having authored the "Tanaka Memorial Imperialist Conquest Plan," which advocated the conquest of Manchuria, Mongolia, and eventually the whole of China. He was alleged to have presented the plan to the emperor in 1927. The plan was presented as fact in the wartime propaganda film seriesWhy We Fight, which claimed that the plan envisaged the conquest of America after East Asia.[3] In a memoir published in the mid-1950s, a Japanese-born Taiwanese businessman, Tsai Chih-Kan, claimed that he had personally copied the "Plan" from the Imperial Library on the night of 20 June 1928 in a covert action assisted by several of Japan's leading prewar politicians and officers, who were opposed to Tanaka. Today, most historians regard the document as a forgery.[4][5]