The Toranomon Incident was an assassination attempt occurred on December 27, 1923 at Toranomon, by Daisuke NANBA who fired a stick-shaped gun at Imperial Prince Hirohito (later the Emperor Showa), then-regent and crown prince, when Prince was heading by car for the opening ceremony of the 48th Imperial Diet, and Nanba was arrested red-handed.
1923年12月27日、難波大助（なんばだいすけ）が虎ノ門で第48帝国議会の開院式に向かう摂政・皇太子裕仁親王（後の昭和天皇）の車に向けてステッキ状の拳銃を発砲・狙撃し、現行犯で逮捕された暗殺未遂事件。