Ōishi had four men scale the fence and enter the porter’s lodge, capturing and tying up the guard there.He then sent messengers to all the neighboring houses, to explain that they were not robbers but retainers out to avenge the death of their master, and that no harm would come to anyone else: the neighbors were all safe.
One of the rōnin climbed to the roof and loudly announced to the neighbors that the matter was an act of revenge (katakiuchi, 敵討ち). The neighbors, who all hated Kira, were relieved and did nothing to hinder the raiders.
After posting archers (some on the roof) to prevent those in the house (who had not yet awakened) from sending for help, Ōishi sounded the drum to start the attack. Ten of Kira’s retainers held off the party attacking the house from the front, but Ōishi Chikara’s party broke into the back of the house.
Kira, in terror, took refuge in a closet in the veranda, along with his wife and female servants. The rest of his retainers, who slept in barracks outside, attempted to come into the house to his rescue. After overcoming the defenders at the front of the house, the two parties led by father and son joined up and fought the retainers who came in.
The latter, perceiving that they were losing, tried to send for help, but their messengers were killed by the archers posted to prevent that eventuality.
Eventually, after a fierce struggle, the last of Kira’s retainers were subdued; in the process, the rōnin killed 16 of Kira’s men and wounded 22, including his grandson. Of Kira, however, there was no sign. They searched the house, but all they found were crying women and children. They began to despair, but Ōishi checked Kira’s bed, and it was still warm, so he knew he could not be far away.