IJA may refer to:
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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 ...
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International Journal of Astrobiology''
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International Jugglers' Association
The International Jugglers' Association or IJA is the world's oldest and largest nonprofit circus organization, and is open to members worldwide. It was founded in the United States in 1947, with the goal of providing, "an organization for ju ...
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International Journal of Audiology''
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International Juridical Association (1931–1942)
{{disambiguation