In 1351, due to an internal conflict of Muromachi bakufu (Kanno Disturbance), Takauji ASHIKAGA temporarily surrendered to the Southern Court and the two courts were once unified by the Southern Court (Shohei Itto).
1351年（正平6年、北朝の観応2年）、室町幕府の内紛（観応の擾乱）により、足利尊氏が一時的に南朝に降伏し、一旦南朝に統一された（正平一統）。