Chûkon giretsu - Jitsuroku Chûshingura

Lord Asano Takumi-no-Kami Naganori was charged with receiving a group of envoys from the Imperial Court in Kyoto. He was young and slightly inexperienced, so Lord Kira Kozuke-no suke Yoshinako was given the task of instructing Lord Asano in the customs of the ceremony. On the day of the reception, something went terrible wrong, and Lord Asano attempted to kill Lord Kira. For this, Lord Asano was order to commit seppuku. However, in violation of existing law, Lord Kira was not punished.