Chushingura is one of the most famous and popular Samurai story during Edo period. It is the historical revenge story by 47 Ronin of the death of their lord, Asano Naganori. It was played in Kabuki and other theaters. Even today, it is very popular Samurai story.
In 1701, Asano Naganori suddenly tried to kill Kira Yoshihisa at Edo Castle. In this time, fighting at the castle was death penalty. Asano was ordered to do Seppuku next day, and his land was abandoned. However, because Kira did nothing to protect himself. He was considered that he was not involved in this fighting.
Later, Asano's loyal Samurai, who already became Ronin at this moment, decided to revenge Kira for their lord Asano.
In December 14, 47 Ronin attacked Kira's house at night and killed Kira. They cut his head and brought it from Ryogoku to Sengakuji where the grave of Asano is located. They announced to their lord that the revenge was successful. Soon, they did Seppuku.