Imperial Japanese Army
ground-based armed forces of Japan, from 1868 to 1945
The Imperial Japanese Army (IJA) 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 the Meiji period, fought in numerous conflicts including the First Sino-Japanese War, the Russo-Japanese War, World War I, the Second Sino-Japanese War, and World War II, and became a dominant force in Japanese politics. Initially formed from samurai domain armies that overthrew the Tokugawa Shogunate, it evolved after the Meiji Restoration into a powerful modern military influenced by French and German models, supported by its own air arm, the Imperial Japanese Army Air Service.
The IJA was responsible for several successful overseas military campaigns that resulted in the imperialist expansion of the Japanese Empire, including the First Sino-Japanese War, the invasion of Taiwan, the Russo-Japanese War, the seizure of German territories in Asia in World War I and the invasion of Manchuria. By the 1930s, the Army and Navy had largely subordinated the civilian government and controlled Japan. In the Second Sino-Japanese War, the IJA invaded and occupied the most populous parts of China proper, but fought to a stalemate as its lines of communication stretched deep into the Chinese interior. In the Pacific War, it initially achieved great success capturing vast swathes of territory across the Asia-Pacific, before being pushed back by island-hopping Allied offensives that reached the frontiers of Japan and enabled the large-scale bombing and blockade of Japan.
Notorious for committing widespread war crimes, including mass murder, mass rape and forced labour, the army was dissolved after Japan's surrender in 1945. The Japan Ground Self-Defense Force succeeded it as Japan's ground warfare service.
History
Origins (1868–1871)
In the mid-19th century, Japan had no unified national army and the country was made up of feudal domains (han) with the Tokugawa shogunate (bakufu) in overall control, which had ruled Japan since 1603.
Begin with the source’s own compact description: “Imperial Japanese Army” is ground-based armed forces of Japan, from 1868 to 1945. The dossier treats that line as a proposition to test through Imperial, Japanese and Army, not as a finished interpretation.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 14, 2026. The linked authority identifier is Q276535. VIAF identifies the subject as 152982774. The Library of Congress control number is n79079557. 1 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1871, 1945, 1868 and 1603.
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This entry incorporates text from “Imperial Japanese Army” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.