The was an infantry division in the Imperial Japanese Army. Its call-sign was (from the Yodo River). History The 4th Division was formed in Osaka City in January 1871 as the , one of six regional commands created in the fledgling Imperial Japanese Army. The Osaka Garrison had responsibility for the central region of Honshū (Kansai district), ranging from Shiga Prefecture to Hyōgo Prefecture. The six regional commands were transformed into divisions under the army reorganization of 14 May 1888. Early action The 4th regional command played a vital role in the defeat of the Satsuma Rebellion in 1877. During the First Sino-Japanese War in 1895, the 4th division landed on Liaodong Peninsula and performed security duties as part of army reserve, though its 7th Mixed Brigade was sent to northern Formosa in September 1895 during the Japanese invasion of Taiwan, and helped to pacify the Kapsulan (Yilan) district. During the Russo-Japanese War, the division, led by Lieutenant General Ogawa Mataji, participated in the Battle of Nanshan, Battle of Liaoyang (where the commander was wounded and replaced by Lieutenant General Tsukamoto Katsuyoshi), Battle of Shaho and Battle of Mukden. The division later served in the Siberian Intervention and the Jinan Incident (1928). Action in Second Sino-Japanese War and Pacific War On 10 February 1937, the 4th Division came under the command of the Kwantung Army in Manchuria. Actually departing Osaka 6 September 1937, and landing in Daegu 12 September 1937. It participated in Central Hubei Operation, Battle of South Henan, and Jiangbei operation (attacking from northern Anlu). It was transferred to the 11th Army on 1 July 1940. In September 1941, the division participated in Battle of Changsha (1941). From 11 June 1941, it started reorganization to a triangular division, giving the 70th infantry regiment to the 25th division, eventually transferred to the active reserve force in the Japanese home islands. In March 1942, the reorganization was complete and the 4th Division was then reassigned to the 14th Army, arriving in the Philippines to participate in the Battle of Bataan on 3 April 1942. The 4th Division also significantly contributed to Japanese efforts in the Battle of Corregidor on 5 May 1942. After the Philippines campaign (1941–1942) ended on 8 May 1942, the division was returned to the home islands to perform security duties. It came under the control of the 25th Army in September 1943. The 4th Division departed