noun
Toranomon Incident
Historical term referring to the assassination attempt on Prince Regent Hirohito on December 27, 1923, at the Toranomon intersection in Tokyo.
虎ノ門事件は大正12年に起きた。
The Toranomon Incident occurred in 1923.
歴史の授業で虎ノ門事件について学んだ。
We learned about the Toranomon Incident in history class.
Named after the Toranomon (虎ノ門) area in Tokyo where the incident took place; 事件 means 'incident' or 'affair'.