 He was accorded the highest decorations and honors, and was elevated to the title of "danshaku" (baron) under the "kazoku" peerage system.Honjō later became Chief aide-de-camp to Emperor Hirohito until 1936, when his suspected involvement in the February 26 Incident led to his retirement.He kept an extensive diary during his time as aide-de-camp, which was published by the University of Tokyo Press in 1983.