The book demonstrates that, even if during the first period of the Shwa era (1931-1945) the real driving force to war was the Japanese military, Hirohito, as supreme commander, gave full support to the army. On multiple occasions, as an emperor, he sanctioned many government policies. Accordingly, he was responsible for the war and for the atrocities that the Japanese troops committed in Asia during the Pacific War. Japan’s Empire Disaster is a book of information and training; a reference document that should be read as an educational tool on the history of the modernization of Japan and the war launched by Emperor Meiji and Hirohito to build Japan Empire in the Pacific and East Asia. The book shares the view of the author on Hirohito’s responsibility on the events that marked Japan’s entry into the war that began when Japanese troops invaded Manchuria on September 19, 1931, and culminated with Japan’s surprise attack on the U.S. naval base at Pearl Harbor, on December 7, 1941.