In 1681, Emperor Reigen forced Crown Prince Ichinomiya (later known as the Cloistered Imperial Prince Saishin), who had been named successor to the Imperial Throne in the Cloistered Emperor's will, to become a priest and banished Ichinomiya's maternal grandfather, Saneoki OGURA, to Sado Province because the latter had opposed the Emperor in what would become known as the 'Ogura Incident.'
特に1681年法皇の遺命により儲君に内定していた第一皇子の一宮（後の済深法親王）を強引に出家させ、反対する一宮の外祖父小倉実起を佐渡国に流刑にする「小倉事件」を引き起こす。