In November 1918, Anami graduated from the 30th class of the Army Staff College with the rank of captain. He was assigned to the Imperial Japanese Army General Staff from April 1919 and was promoted to major in February 1922. From August 1923 to May 1925, he was assigned to the staff of the Sakhalin Expeditionary Army, which was responsible for the occupation of northern Sakhalin island during the Japanese intervention in Siberia. Anami was promoted to lieutenant colonel in August 1925.