Ōyama Iwao
Ichinohe was promoted to major general in May 1901, and appointed commander of the IJA 6th Division. During the Russo-Japanese War, he served on the staff of the IJA 3rd Army, and was with Marshal Ōyama Iwao at the crucial Battle of Mukden. After the war, Ichinohe became commander of the prestigious IJA 1st Division and was promoted to lieutenant general in November 1907. He was subsequently transferred to command the new IJA 17th Division. In September 1911, he was transferred to the IJA 4th Division and in January 1912, he returned to the IJA 1st Division.