Japanese First Army was created in 1937.
Japanese First Area Army was created in 1942.
Japanese Korean Army was created in 1904.
Imperial Japanese Army was created in 1868.
Japanese Twelfth Area Army was created in 1945.
Japanese Eighteenth Area Army was created in 1943.
Japanese Third Area Army was created in 1943.
Japanese Thirteenth Area Army was created in 1945.
Japanese Fifth Area Army was created in 1944.
Japanese Second Area Army was created in 1942.
Japanese Eleventh Area Army was created in 1945.
Japanese Seventh Area Army was created in 1944.
Japanese Fourteenth Area Army was created in 1942.