Prince Higashikuni remained steadfast in his opposition to the war with the Allied powers, and was part of the conspiracy (with Prince Asaka, Prince Takamatsu, and former Prime Minister Konoe) which finally ousted Tōjō in July 1944 following the fall of Saipan to American forces. The American researchers with SCAP also found out that he had planned towards the end of the war to depose Hirohito, placing the minor Akihito on the throne instead, governing the country with himself as regent.