The Anna Incident took place, and Prince Tamehira, the fourth prince of Emperor Murakami, and Prince Morihira fought each other to become the crown prince during Emperor Reizei's reign; consequently, Emperor Enyu (Prince Morihira) became the Emperor in 969.
村上天皇の第四皇子為平親王と、守平親王の間で冷泉天皇の皇太子（皇太弟）をめぐって安和の変があり、安和2年（969年）、円融天皇（守平親王）に譲位。