1. Army Fortification Headquarters of Japan, Explosive design of protective structures, 1942.
2. Department of the Army, Fundamental of protective design for conventional weapons, Technical Manual TM 5-855-1, November 1986 and August 1998 (for official use only).
3. Department of the Army, the Navy and the Air Force, Structures to resist the effects of accident explosions, Army TM5-1300, Navy NAVFAC P-397, Air Force AFR 88-22, Washington, DC, 1990.
4. Johoji A. Air defense history in Japan. Hara Shobo, 1981 [in Japanese].
5. Yomiuri Newspaper Co. Edited, Emperor of Showa history, 1.4, 1967 [in Japanese].