In 1443, in what became known as the Kinketsu Incident (the incident at the Forbidden Palace) some of the surviving Southern Court former retainers, along with the entire household of the Hino clan, broke in to the Imperial Palace where they stole two of the Three Imperial Regalia of Japan, the Ama-no Murakumo no Tsurugi (the heavenly cloud gathering sword) and the Yasakani no Magatama (the Grand Jewels) before fleeing with Tsuzosu and Gonzosu, brothers of the Southern Court lineage.
1443年（嘉吉3年）には南朝の遺臣や日野氏一族が御所に乱入し南朝皇族の通蔵主・金蔵主兄弟をかついで神璽・宝剣を一時奪還する禁闕の変が起きる。