
Daimyo whose seppuku sparked the 47 Ronin incident.
Naganori inherited the Ako domain in Harima Province at age eight. He became daimyo of the 53,000 koku domain, which he ruled until his death. His administration was marked by financial difficulties.
Asano Naganori was ordered to commit seppuku after attacking Kira Yoshinaka within Edo Castle. The attack was a response to Kira's insults. Naganori's death left his domain leaderless and his samurai masterless.
Naganori drew his sword and attacked Kira Yoshinaka in the corridors of Edo Castle. The attack failed to kill Kira but violated shogunate law. This incident led to Naganori's arrest and subsequent seppuku.
After Naganori's seppuku, the Tokugawa shogunate confiscated the Ako domain, rendering his samurai masterless ronin. This act set the stage for the revenge plot led by Oishi Yoshio.