As the war progressed and Germany began to retreat, Ōshima never wavered in his confidence that Germany would emerge victorious. However, in March 1945, he reported to the Tokyo on the "danger of Berlin becoming a battlefield" and revealing a fear "that the abandonment of Berlin may take place another month". On 13 April 1945, he met with Ribbentrop (for the last time, it turned out) and vowed to stand with the leaders of the Third Reich in their hour of crisis. "I do not wish to be treated in the same manner as other diplomats merely by reason of great danger from the ravages of war", he proclaimed, but he was informed that evening by the Foreign Ministry's chief of protocol: all diplomats were to leave Berlin at once by Hitler's direct order. Ōshima subsequently accepted that order then sent his wife to Bad Gastein, a mountain resort in Austria, and, the next day, left to join her, together with most of the Japanese diplomatic staff.