 Between 1701 and 1703, the so-called Akō Affair furnished how "bushidō" should be judged.In 1701, the daimyō of Akō, Asano (Takumi-no-kami) Naganori, attacked the Master of Ceremonies ("Kōke") at the shōgunal court, Kira (Kōzuke-no-suke) Yoshinaka, drawing his sword in one of the corridors of Edo Castle, residence of Tsunayoshi, the fifth Tokugawa shōgun.The exact circumstances leading to Asano's action have never been known, but Asano claimed to have been insulted by Kira.