The Japanese 1st Army (第1軍, Dai-ichi gun) was an army of the Imperial Japanese Army. It was raised and demobilized on three occasions.

Quick Facts Japanese First Army, Active ...

Japanese First Army
Japanese General Kuroki and his Chief of Staff Shigeta Fujii
Active	September 1894 – September 1945
Country	Empire of Japan
Branch	Imperial Japanese Army
Type	Infantry
Role	Corps
Nickname(s)	Otsu (乙, Second)
Engagements	First Sino-Japanese War Russo-Japanese War Second Sino-Japanese War World War II

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The Japanese 1st Army was initially raised during the First Sino-Japanese War from 1 September 1894 – 28 May 1895 under the command of General Yamagata Aritomo. It participated in all of the major battles of that conflict, and was demobilized at the successful end of that war.

It was revived for the Russo-Japanese War from 2 February 1904 – 9 December 1905 under the command of General Kuroki Tamemoto. Its forces were the first to land in Korea and Manchuria and it fought in most of the major campaigns of the war, including the Battle of Yalu River, Battle of Motien Pass, Battle of Liaoyang, Battle of Shaho, Battle of Sandepu, and Battle of Mukden. It was again demobilized at the end of that conflict.

The Japanese 1st Army was raised again on 26 August 1937 in Tianjin, China under the Japanese China Garrison Army. In addition to protecting the Japanese settlement at Tianjin, it served as a reinforcement to the newly formed Japanese Northern China Area Army following the Marco Polo Bridge Incident during the Second Sino-Japanese War. The 1st Army subsequently participated in various campaigns in North China under the operational command of the Japanese Northern China Area Army, including the North China Incident, Beiping–Hankou Railway Operation, and the Battle of Taiyuan before being demobilized at Taiyuan, Shanxi province after the end of World War II on 30 September 1945.

• Jowett, Bernard (1999). The Japanese Army 1931-45 (Volume 2, 1942-45). Osprey Publishing. ISBN 1-84176-354-3.
• Madej, Victor (1981). Japanese Armed Forces Order of Battle, 1937-1945. Game Publishing Company. ASIN: B000L4CYWW.
• Marston, Daniel (2005). The Pacific War Companion: From Pearl Harbor to Hiroshima. Osprey Publishing. ISBN 1-84176-882-0.

• Wendel, Marcus. "Axis History Factbook". Japanese 1st Army.