Asano Naganori

Asano Naganori (1667-1701) was the lord of Akō in Harima Province (present-day Akō City, Hyōgo Prefecture), and is a person who left his name in history through the "Matsu Corridor Sword Attack Incident" of 1701. He drew his sword against Kira Yoshinaka (Kōzuke-no-Suke), the shogunate's ceremonial etiquette instructor, and was ordered to commit ritual suicide (seppuku) the same day. This incident became the trigger for the following year's assault on the Kira residence by the Akō rōnin (Chūshingura), which has been passed down to posterity as a story symbolizing Japanese bushido and the spirit of righteousness.

Naganori was born in 1667 as the eldest son of Asano Nagatomo. At age nine, in 1675, he inherited the family headship upon his father's death and became lord of the Akō Domain with 53,000 koku. As domain lord, he worked on internal administration, and is said to have devoted himself to developing Akō's salt fields and organizing the castle town. He also had a cultured side, enjoying the tea ceremony, and was beloved in Akō as a mild-mannered domain lord.

On March 14, 1701, in the main corridor of Edo Castle (the Matsu Corridor), he suddenly drew his sword and slashed at Kira Yoshinaka, who was instructing him in etiquette for the reception of imperial envoys. Kira suffered light injuries, but the sword attack incident within Edo Castle in the presence of the shogun was considered a serious crime, and Naganori was ordered to commit seppuku the same day. He ended his life at the young age of 35. There are various theories about the reason for this incident, with the most common being that he had received insults and harassment from Kira.

In the realm of Japanese swords, Naganori is one of the people who most dramatically embodied the relationship between a samurai's honor and the sword. The wakizashi (short sword) used in the Matsu Corridor attack is spoken of as a historical artifact symbolizing a samurai's anger and honor. Also, the swords used by the Akō rōnin in their assault on the Kira residence are still preserved at places such as Sengaku-ji Temple (Minato Ward, Tokyo), and many sword enthusiasts visit these locations as places associated with Chūshingura. Naganori's sword attack incident is inscribed in Japanese cultural history as one of the most dramatic episodes showing that Japanese swords are symbols that samurai staked their lives and honor on.