It is widely believed that the major source of kamikaze suicide pilots was the Air Force Cadet Officer System in the Japanese Imperial Navy and Army Forces, which recruited university and college students on a voluntary basis. In fact, however, the majority of kamikaze pilots were young noncommissioned or petty officers, that is graduates of Navy and Army junior flight training schools. A total of 708 noncommissioned Army officers died as kamikaze pilots, while the total death toll of Army Air Force officer class kamikaze pilots was 621. In the Navy, 1732 petty officers died as kamikaze pilots compared with 782 officers. Many assume that the majority of kamikaze pilots were former college students, because the letters-home, diaries and wills of these young men, who became kamikaze pilots through the Air Force Cadet Officer System, were compiled and published as books and pamphlets after the war. The best known of these publications is Kike Wadatsumi no Koe (Listen to the Voices from the Sea). Unfortunately similar personal records left behind by non-commissioned and petty officers are not publicly available. It is therefore necessary to rely on private records to gain a fuller understanding of the thoughts and ideas of these kamikaze pilots.