Ōishi Yoshio, leader of the 47 rōnin, leads his men on their raid of Kira's mansion. (Public Domain) On this day in 1701, 47 rōnin (leaderless samurai) killed Kira Yoshinaka, an Edo government official, in revenge for the death of their leader Asano Naganori. Asano had met with Kira at Edo castle in 1700 and…