Forty-seven rōnin
Incident
The revenge of the forty-seven rōnin, also known as the Akō incident or Akō vendetta, is a historical event in Japan in which a band of rōnin avenged the death of their master on 31 January 1703. The incident has since become legendary. Wikipedia
Date: January 31, 1703
First reporter: Terasaka Kichiemon
Target: To have Kira Yoshinaka commit ritual suicide (seppuku) to avenge their master Asano Naganori's death