The army strategist who turned a railway pretext into the conquest of Manchuria
In a 1948 prison diary, he looked back on the Manchurian Incident’s success and wrote that extending the war into China had been a mistake.
Seishirō Itagaki was an Imperial Japanese Army officer and politician who became a central figure in the Manchurian Incident and the expansion of Japan’s war in China. With Kanji Ishiwara, he helped plan the 1931 railway explosion and turned the Kwantung Army’s insubordinate action into the occupation of Manchuria and the creation of Manchukuo. He later served as war minister and commanded forces in several theaters before being convicted of responsibility for aggressive war at the International Military Tribunal for the Far East and executed.
Activities and affiliations
Career Timeline
- 1904Graduated Army Academy; commissioned second lieutenant
- 1916Graduated Army War College; began staff service
- 1924–1926Assistant military attaché at the Japanese embassy in China
- 1929–1932Senior staff officer of the Kwantung Army; directed the Manchurian Incident and occupation
- 1934–1937最高 military adviser to Manchukuo; vice chief and chief of staff of the Kwantung Army
- 1937–1939Commander of the 5th Division; minister of war
- 1939–1941Chief of staff of the China Expeditionary Army
- 1941–1945Commander of the Chosen Army and Seventh Area Army; signed the surrender in Singapore
- 1948Executed after conviction by the International Military Tribunal for the Far East
Related historical events
Planning the Manchurian Incident and the Kwantung Army’s campaign
As a Kwantung Army staff officer, Itagaki Seishirō planned the provocation that began the 1931 Manchurian Incident with Ishiwara Kanji. The September 18 explosion on the Japanese-owned South Manchuria Railway was staged to appear to be a Chinese attack, and the two officers used it as a pretext for an invasion of northeastern China. Without waiting for orders from the government in Tokyo or the army high command, the Kwantung Army began occupying strategic points along the railway, including Mukden and Changchun, that night. Although the government and Army General Staff sought to prevent the incident from widening, the army continued its offensive, taking control of northeastern China by early 1932 and establishing Manchukuo. Itagaki’s role went beyond endorsing the field army’s unilateral action: he helped connect a premeditated provocation to the expansion of invasion and the institutionalization of colonial rule.