Genpei War

Quick Facts: Who was Genpei War?

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Genpei War

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A national civil war (1180–1185) between the Taira and Minamoto clans in Japan.

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2Day Chrono-Wiki & Primary Historical Archives

Origins & Early Life

The Genpei War (源平合戦, Genpei Kassen, Genpei-Gassen; 1180–1185) was a national civil war between the Taira and Minamoto clans during the late Heian period of Japan. It resulted in the downfall of the Taira and the establishment of the Kamakura shogunate under Minamoto no Yoritomo, who appointed himself as Shōgun in 1192, governing Japan as a military dictator from the eastern city of Kamakura. It followed a coup d'état by the Taira in 1179 with the removal of rivals from all government posts, and subsequently banishing them, and a call to arms against the Taira, led by the Minamoto in 1180. The ensuing Battle of Uji took place just outside Kyoto, starting a five-year-long war, concluding with a decisive Minamoto victory in the naval Battle of Dan-no-ura. However, it has been pointed out that the Battle of Ōshū in 1189 was the last battle during this period of civil war, as it completed Yoritomo's nationwide domination through the annexation of Northeast Japan.

Career & Major Achievements

The name "Genpei" (Japanese pronunciation: [ɡem.pei, -peː], sometimes romanized as Gempei) comes from alternate readings of the kanji "Minamoto" (源 Gen) and "Taira" (平 Hei, pronounced as the second element in some compounds as -pei). The conflict is also known in Japanese as the Jishō–Juei War (治承・寿永の乱, Jishō–Juei no Ran), after the two Imperial eras between which it took place. The term Genpei Kassen is sometimes used in Japan, but it has been argued that it is not appropriate to use the term "Genpei" for this war. The Genpei War was the culmination of a decades-long conflict between the two aforementioned clans over dominance of the Imperial court and, by extension, control of Japan. In the Hōgen Rebellion and in the Heiji Rebellion of earlier decades, the Minamoto attempted to regain control from the Taira and failed.

Enduring Legacy & Impact

In 1180, Taira no Kiyomori put his grandson Antoku (then only 2 years of age) on the throne after the abdication of Emperor Takakura. Emperor Go-Shirakawa's son Mochihito felt that he was being denied his rightful place on the throne and, with the help of Minamoto no Yorimasa, sent out a call to arms to the Minamoto clan and Buddhist monasteries in May. However, this plot ended with the deaths of Yorimasa and Mochihito. In June 1180, Kiyomori moved the seat of imperial power to Fukuhara-kyō, "his immediate objective seems to have been to get the royal family under his close charge." The actions of Taira no Kiyomori having deepened Minamoto hatred for the Taira clan, a call for arms was sent up by Minamoto no Yorimasa and Prince Mochihito. Not knowing who was behind this rally, Kiyomori called for the arrest of Mochihito, who sought protection at the temple of Mii-dera.

Chronological Milestones & Life Events

1. 1179: 1179 Milestone — It followed a coup d'état by the Taira in 1179 with the removal of rivals from all government posts, and subsequently banishing them, and a call to arms against the Taira, led by the Minamoto in 1180.
2. 1180: 1180 Milestone — The Genpei War (源平合戦, Genpei Kassen, Genpei-Gassen; 1180–1185) was a national civil war between the Taira and Minamoto clans during the late Heian period of Japan.
3. 1189: 1189 Milestone — However, it has been pointed out that the Battle of Ōshū in 1189 was the last battle during this period of civil war, as it completed Yoritomo's nationwide domination through the annexation of Northeast Japan.
4. 1192: 1192 Milestone — It resulted in the downfall of the Taira and the establishment of the Kamakura shogunate under Minamoto no Yoritomo, who appointed himself as Shōgun in 1192, governing Japan as a military dictator from the eastern city of Kamakura.

Historical Fact-Check Quiz: Genpei War

True or False: “The Battle of Dan-no-ura was the only major battle fought during the entire Genpei War period.”

Answer (FALSE ❌): While decisive, the war featured multiple engagements, including the Battle of Uji and the later Battle of Ōshū in 1189.

Contemporary Figures & Related Historical Timelines

• Al-Kamil — Historical peer (Born in 1180) (1180): Ayyubid Sultan of Egypt, known for defeating the Fifth Crusade.
• Emperor Go-Toba — Historical peer (Born in 1180) (1180): 82nd Emperor of Japan; reigned 1183–1198, known for political upheaval.
• Afonso I of Portugal — Historical peer (Died in 1185) (1185): The first King of Portugal, founder of the independent Portuguese Kingdom.
• Bhāskara II — Historical peer (Died in 1185) (1185): Polymath of the Siddhānta school, renowned for advanced works in mathematics and astronomy.
• Emperor Go-Shirakawa — Historical peer (Died in 1192) (1192): Powerful, yet politically constrained emperor who maintained influence through the insei system.
• Iltutmish — Historical peer (Born in 1192) (1192): Founder of the Delhi Sultanate, Iltutmish ruled from 1211 to 1236.
• Hildegard of Bingen — Historical peer (Died in 1179) (1179): Benedictine abbess, polymath, mystic, and composer of the High Middle Ages.
• Snorri Sturluson — Historical peer (Born in 1179) (1179): Icelandic historian, poet, and politician, renowned for the Prose Edda and Heimskringla.
• Benkei — Historical peer (Died in 1189) (1189): Legendary warrior monk renowned for immense strength and unwavering loyalty.
• Henry II of England — Historical peer (Died in 1189) (1189): Powerful Angevin monarch who ruled England and vast territories across France.

Frequently Asked Questions about Genpei War