On his return to Japan, he served in a number of administrative positions within the Imperial Army General Staff Office, including a stint from 1923 to 1924 when he was stationed in Hankou, China.

[1] Tashiro became Vice Chief of the 5th Section (Asian Intelligence), 2nd Bureau within the General Staff in 1926, and was considered an expert on China.

During the First Shanghai Incident, his commander, General Yoshinori Shirakawa was assassinated and he served as interim commander of the Shanghai Expeditionary Army, but resigned due to ill health.

He was reassigned as commander of the Kempeitai within the Kwantung Army in Manchukuo from 1933 to 1934, and was promoted to lieutenant general in 1934.

[2] However, Tashiro was hospitalized for heart illness and died in Tianjin on July 16, 1937, only a week later.