Not only did he hold special conferences such as the 'Ogikubo Meeting' on July 19, 1940, in which he confirmed the construction of 'new order in East Asia,' and 'Tekigaiso Meeting' on October 15, 1941, in which he negotiated the pros and cons of war against the U.S., at times, he even held regularly scheduled top-level ministerial meetings at Tekigaiso and on the eve of the Second World War, many important national policies were approved here.
「東亜新秩序」の建設を確認した昭和15年7月19日の「荻窪会談」や、対米戦争の是非とその対応についてを協議した昭和16年10月15日の「荻外荘会談」などの特別な協議はもとより、時には定例会合の五相会議までをも荻外荘で開いており、第二次世界大戦前夜の重要な国策の多くがここで決定されている。