 On 15 August 1945, Emperor Hirohito made a radio announcement conceding defeat and calling for the military to lay down their arms.After listening to the announcement announcing Japan's defeat, Ugaki made a last entry in his diary noting that he had not yet received an official cease-fire order, and that as he alone was to blame for the failure of his valiant aviators to stop the enemy, he would fly one last mission himself to show the true spirit of "bushido".His subordinates protested, and even after Ugaki had climbed into the backseat of a Yokosuka D4Y, Warrant Officer Akiyoshi Endo—whose place in the "kamikaze" roster Ugaki had usurped—climbed into the same space that the admiral had already occupied.