The Forty-Seven Ronin (1701-1703): Japan's Famous Revenge Story

The Forty-Seven Ronin were former retainers of Asano Naganori, lord of the small domain of Akō, who avenged their master by killing the court official Kira Yoshinaka in Edo at the start of 1703. The Akō incident, which began with Asano’s sword attack on Kira inside Edo Castle in 1701, provoked a sharp debate about law and loyalty in Tokugawa Japan and became the country’s best-loved story of samurai devotion, retold for three centuries as Chūshingura.

Background: peace and ceremony in Edo

By 1700 Japan had been at peace for nearly a century under the Tokugawa shogunate. The samurai were still a hereditary warrior class, but most now served as administrators, and private violence was strictly controlled. The shogun Tokugawa Tsunayoshi, who ruled from 1680 to 1709, was a keen patron of Confucian learning and ritual.

Every year the shogun received envoys from the imperial court in Kyoto. Daimyo, the regional lords, were appointed to host them, and officials expert in court etiquette, known as kōke, instructed the hosts. In 1701 the 33-year-old Asano Naganori, lord of Akō in Harima province with an assessed income of about 50,000 koku of rice, was one of the hosts. His instructor was Kira Kōzuke-no-suke Yoshinaka, a senior master of ceremonies then about 60 years old.

The attack in Edo Castle

On the 14th day of the 3rd month of Genroku 14, which corresponds to 21 April 1701, Asano drew his short sword in the Pine Corridor (Matsu no Ōrōka) of Edo Castle and struck at Kira, wounding him on the forehead and back before he was restrained. Drawing a sword inside the castle was a grave offence.

The reaction was swift. That same day Asano was ordered to commit seppuku, ritual suicide, and his domain was confiscated. Kira, who had not drawn his sword, was not punished. Many contemporaries thought the judgement one-sided, because the traditional principle in a quarrel was that both parties should be punished.

Why Asano attacked remains unknown. He spoke only of a grudge. Stories that Kira had demanded bribes, insulted Asano or deliberately misled him about etiquette appeared later and cannot be proved. Some historians point to Asano’s quick temper or possible illness.

The road to revenge

When Akō Castle was surrendered to the shogunate’s officials in the 4th month of 1701, some 300 samurai of the domain became ronin, warriors without a master. The chief retainer, Ōishi Kuranosuke Yoshio, handed over the castle peacefully and dispersed the domain’s funds among its retainers.

Ōishi’s first aim was not revenge but the revival of the Asano house under Asano’s younger brother, Asano Daigaku Nagahiro. A core group of retainers, at first more than a hundred men, signed pledges to stay loyal. Ōishi moved to Yamashina near Kyoto, where his visits to the pleasure quarters later became part of the legend as a ruse to deceive Kira’s spies.

In the 7th month of 1702 the shogunate placed Daigaku in the custody of the main branch of the Asano family in Hiroshima, ending any hope of restoring the house. Ōishi now committed to revenge. Many of the original group dropped out, and the rest gathered secretly in Edo, some posing as merchants, to study Kira’s movements and the layout of his new mansion in the Honjo district.

The night attack

The raid took place on the night of the 14th to 15th day of the 12th month of Genroku 15, which corresponds to 30–31 January 1703. Forty-seven men, wearing chain mail under their clothes and armed with swords, spears and bows, divided into two groups and attacked Kira’s mansion from the front and rear gates. They notified the neighbours that they were carrying out a vendetta and had no quarrel with them.

After a fight of about two hours, the ronin found Kira hiding in a storage shed for charcoal. He was killed and his head was taken. Accounts suggest that around 15–16 of Kira’s household were killed and more than 20 wounded, while none of the attackers died. Kira’s grandson and heir, Yoshichika, was among those wounded.

At dawn the ronin marched across Edo to Sengaku-ji, the temple where Asano was buried, and laid Kira’s head at their lord’s grave. They then gave themselves up to the authorities.

Debate and judgement

The shogunate faced a difficult choice. The ronin had broken the law against private violence in the capital, yet they had acted out of loyalty, a virtue the regime itself praised. For nearly two months officials and scholars argued over the case.

Some Confucian scholars, such as Muro Kyūsō, praised the men as righteous and wrote admiring accounts of them. Others, notably Ogyū Sorai, argued that whatever their motives, public law had to come first, and that the honourable course was to allow them to die as samurai rather than as criminals.

The second view prevailed. On the 4th day of the 2nd month of Genroku 16 (20 March 1703), the 46 ronin who had surrendered, held in four separate daimyo households, were ordered to commit seppuku and did so the same day. They were buried at Sengaku-ji beside Asano. The Kira house was also abolished, and Yoshichika was sent into exile.

Key people

• Asano Naganori (1667–1701): lord of Akō, whose attack on Kira began the affair.
• Kira Yoshinaka (1641–1703): master of ceremonies to the shogunate and target of the revenge.
• Ōishi Kuranosuke Yoshio (1659–1703): Akō’s chief retainer, who organised and led the raid.
• Ōishi Chikara (c. 1688–1703): Ōishi’s son, the youngest of the ronin at about 15.
• Horibe Yahei (c. 1627–1703): the oldest of the ronin, aged about 76.
• Tokugawa Tsunayoshi (1646–1709): the shogun under whom both judgements were made.

Myths and facts

“All forty-seven died.” Forty-seven men took part in the raid, but Terasaka Kichiemon, a foot soldier, left the group soon afterwards, possibly sent as a messenger. He was later pardoned and lived until 1747. Forty-six men committed seppuku.

“Kira was a notorious villain.” The image of Kira as greedy and cruel comes largely from the plays. In his own fief of Kira in Mikawa province, he is remembered as a good lord who built a dyke and promoted farming.

“Their act was universally admired.” In fact it was contested from the start. Besides Ogyū Sorai, the author of Hagakure, a famous book on samurai conduct dictated by Yamamoto Tsunetomo between about 1709 and 1716, criticised the ronin for waiting nearly two years instead of striking at once.

From incident to legend and legacy

Within weeks of the seppuku, plays hinting at the affair were staged in Edo, and they were quickly banned. Because the shogunate prohibited dramas about recent events involving samurai, writers disguised the story. Chikamatsu Monzaemon set it in the fourteenth century in his puppet play Goban Taiheiki (1706).

The definitive version was Kanadehon Chūshingura (“The Treasury of Loyal Retainers”), a puppet play by Takeda Izumo II, Miyoshi Shōraku and Namiki Senryū first performed in Osaka in 1748. It renames Asano as Enya Hangan, Kira as Kō no Moronao and Ōishi as Ōboshi Yuranosuke. Adapted for kabuki almost at once, it became one of the most performed works in Japanese theatre and inspired countless woodblock prints.

The story reached the West through A. B. Mitford’s Tales of Old Japan in 1871. In Japan it has been filmed dozens of times, including Mizoguchi Kenji’s The 47 Ronin (1941–1942), and remains a staple of year-end television.

The meaning of the ronin has shifted with Japan’s politics. In 1868 the new Meiji government sent an imperial envoy to Sengaku-ji to honour them, presenting them as models of loyalty. In the decades before 1945 they were used to promote devotion to the state, and after the war the occupation authorities briefly restricted performances of Chūshingura.

Today the story is enjoyed more as drama than as a moral lesson. Sengaku-ji holds the Gishi-sai festival every year on 14 December, the traditional date of the raid, and visitors still burn incense at the graves of Asano and his retainers. The episode is also studied by historians as evidence of the tension between law and samurai honour in a long era of peace, the same era that saw Japan restrict foreign contact under the sakoku policy.

Timeline

• 1701, 21 April: Asano attacks Kira in Edo Castle and is ordered to commit seppuku the same day.
• 1701, May: Akō Castle is surrendered to the shogunate.
• 1702, August: Asano Daigaku is placed in custody, ending hopes of reviving the house.
• 1703, 30–31 January: The ronin attack Kira’s mansion in Honjo and kill him.
• 1703, 20 March: Forty-six ronin commit seppuku and are buried at Sengaku-ji.
• 1706: Chikamatsu’s Goban Taiheiki dramatises the story.
• 1748: Kanadehon Chūshingura is first performed in Osaka.
• 1871: Mitford’s Tales of Old Japan introduces the story to English readers.

Why it matters

The Akō incident is a rare case in which a single episode reveals the values of an entire society. It showed the Tokugawa state wrestling with the clash between personal loyalty and public law, and its retelling as Chūshingura made the Forty-Seven Ronin the enduring symbol of samurai loyalty in Japan and around the world.