The was a national civil war between the

Taira The was one of the four most important clans that dominated Japanese politics during the Heian period of Japanese history – the others being the Minamoto, the Fujiwara, and the Tachibana. The clan is divided into four major groups, named ...

and

Minamoto was a noble surname bestowed by the Emperors of Japan upon members of the imperial family who were excluded from the line of succession and demoted into the ranks of the nobility since 814."...the Minamoto (1192-1333)". ''Warrior Rule in Jap ...

clans during the late

Heian period The is the last division of classical Japanese history, running from 794 to 1185. It followed the Nara period, beginning when the 50th emperor, Emperor Kammu, moved the capital of Japan to Heian-kyō (modern Kyoto). means in Japanese. It is a ...

of Japan. It resulted in the downfall of the Taira and the establishment of the

Kamakura shogunate The was the feudal military government of Japan during the Kamakura period from 1185 to 1333. Nussbaum, Louis-Frédéric. (2005)"''Kamakura-jidai''"in ''Japan Encyclopedia'', p. 459. The Kamakura shogunate was established by Minamoto no Yori ...

under

Minamoto no Yoritomo was the founder and the first shogun of the Kamakura shogunate, ruling from 1192 until 1199, also the first ruling shogun in the history of Japan.Nussbaum, Louis-Frédéric. (2005). "Minamoto no Yoriie" in . He was the husband of Hōjō Masako ...

, who appointed himself as ''

Shōgun , officially , was the title of the military rulers of Japan during most of the period spanning from 1185 to 1868. Nominally appointed by the Emperor, shoguns were usually the de facto rulers of the country, except during parts of the Kamak ...

'' in 1192, governing Japan as a

military dictator A military dictatorship, or a military regime, is a type of dictatorship in which power is held by one or more military officers. Military dictatorships are led by either a single military dictator, known as a strongman, or by a council of mili ...

from the eastern city of

Kamakura , officially , is a city of Kanagawa Prefecture in Japan. It is located in the Kanto region on the island of Honshu. The city has an estimated population of 172,929 (1 September 2020) and a population density of 4,359 people per km2 over the tota ...

. It followed a ''

coup d'état A coup d'état (; ; ), or simply a coup , is typically an illegal and overt attempt by a military organization or other government elites to unseat an incumbent leadership. A self-coup is said to take place when a leader, having come to powe ...

'' 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 Kyoto ( or ; Japanese language, Japanese: , ''Kyōto'' ), officially , is the capital city of Kyoto Prefecture in the Kansai region of Japan's largest and most populous island of Honshu. , the city had a population of 1.46 million, making it t ...

, starting a five-year-long war, concluding with a decisive Minamoto victory in the naval

Battle of Dan-no-ura A battle is an occurrence of combat in warfare between opposing military units of any number or size. A war usually consists of multiple battles. In general, a battle is a military engagement that is well defined in duration, area, and force c ...

. However, it has been pointed out that the

Battle of Ōshū The Battle of Ōshū (奥州合戦, ''Ōshū-kassen'') was a major battle between the Kamakura government and the Northern Fujiwara that took place in the Tōhoku region of Japan from September 1 to October 14, 1189. It resulted in the downfall ...

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. The name "Genpei" (, sometimes

romanized In linguistics, romanization is the conversion of text from a different writing system to the Roman (Latin) script, or a system for doing so. Methods of romanization include transliteration, for representing written text, and transcription, ...

as ''Gempei'') comes from alternate readings of the ''

kanji are logographic Chinese characters, adapted from Chinese family of scripts, Chinese script, used in the writing of Japanese language, Japanese. They were made a major part of the Japanese writing system during the time of Old Japanese and are ...

'' "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 , 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.

Background

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 The was a short civil war fought in order to resolve a dispute about Japanese Imperial succession. The dispute was also about the degree of control exercised by the Fujiwara clan who had become hereditary Imperial regents during the Heian p ...

and in the Heiji Rebellion of earlier decades, the Minamoto attempted to regain control from the Taira and failed. In 1180,

Taira no Kiyomori was a military leader and '' kugyō'' of the late Heian period of Japan. He established the first samurai-dominated administrative government in the history of Japan. Early life Kiyomori was born in Japan, in 1118 as the first son of Taira ...

put his grandson

Antoku was the 81st emperor of Japan, according to the traditional order of succession. His reign spanned the years from 1180 through 1185. His death marked the end of the Heian period and the beginning of the Kamakura period. During this time, the Im ...

(then only 2 years of age) on the throne after the abdication of

Emperor Takakura was the 80th emperor of Japan, according to the traditional order of succession. His reign spanned the years from 1168 through 1180. Genealogy Before his ascension to the Chrysanthemum Throne, his personal name (his ''imina'') was Norihito''-s ...

Emperor Go-Shirakawa was the 77th emperor of Japan, according to the traditional order of succession. His de jure reign spanned the years from 1155 through 1158, though arguably he effectively maintained imperial power for almost thirty-seven years through the ''in ...

's son

Mochihito (died June 1180), also known as the Takakura Prince, and as Minamoto no Mochimitsu (源以光), was a son of Emperor Go-Shirakawa of Japan. He is noted for his role in starting the Genpei War. Believing that Taira no Kiyomori was causing suffe ...

felt that he was being denied his rightful place on the throne and, with the help of

Minamoto no Yorimasa was a Japanese poet, aristocrat and samurai lord. His poetry appeared in various anthologies. He served eight different emperors in his long career, holding posts such as ''hyōgo no kami'' (head of the arsenal). As a general, he led the Mina ...

, sent out a call to arms to the

Minamoto clan was a Aristocracy (class), noble surname bestowed by the Emperors of Japan upon members of the Imperial House of Japan, imperial family who were excluded from the List of emperors of Japan, line of succession and demoted into the ranks of Nobili ...

and

Buddhist Buddhism, also known as Buddhadharma and Dharmavinaya, is an Indian religion and List of philosophies, philosophical tradition based on Pre-sectarian Buddhism, teachings attributed to the Buddha, a wandering teacher who lived in the 6th or ...

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 Fukuhara-kyō (福原京, Capital of Fukuhara) was the seat of Japan's Imperial Court, and therefore the capital of the country, for roughly six months in 1180. It was also the center of Taira no Kiyomori's power and the site of his retirement pa ...

, "his immediate objective seems to have been to get the royal family under his close charge."

Beginnings of the war

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 , also known as just Onjo-ji, or , is a Buddhist temple in Japan located at the foot of Mount Hiei, in the city of Ōtsu in Shiga Prefecture. It is a short distance from both Kyoto, and Lake Biwa, Japan's largest lake. The head temple of t ...

. The Mii-dera monks were unable to ensure him sufficient protection, so he was forced to move along. He was then chased by Taira forces to the

Byōdō-in is a Buddhist temple in the city of Uji in Kyoto Prefecture, Japan, built in the late Heian period. It is jointly a temple of the Jōdo-shū (Pure Land) and Tendai-shū (Heavenly Level) sects. History This temple was originally built ...

, just outside Kyoto. The war began thus, with a dramatic encounter on and around the bridge over the River Uji. This battle ended in Yorimasa's

ritual suicide A suicide method is any means by which a person may choose to end their life. Suicide attempts do not always result in death, and a non-fatal suicide attempt can leave the person with serious physical injuries, long-term health problems, or ...

inside the Byōdō-in and Mochihito's capture and execution shortly afterwards. It was at this point that Minamoto no Yoritomo took over leadership of the Minamoto clan and began traveling the country seeking to rendezvous with allies. Leaving

Izu Province was a province of Japan in the area now part of Shizuoka Prefecture and Tokyo. Nussbaum, Louis-Frédéric. (2005). "''Izu''" in . Izu bordered on Sagami and Suruga Provinces. Its abbreviated form name was . The mainland portion of Izu Prov ...

and heading for the

Hakone Pass The Hakone Pass (), is a mountain pass located between Hakone, Kanagawa, and Kannami, Shizuoka, Japan. It is in the Hakone Mountains and its elevation, 846 meters above sea level. General The Hakone Pass has been an important pass that must b ...

, he was defeated by the Taira in the

battle of Ishibashiyama The was the first in which Minamoto no Yoritomo, who became ''shōgun'' less than a decade later, was commander of the Minamoto forces. The battle was fought on September 14, 1180, in the southwest of present-day Odawara, Kanagawa Prefecture, ...

. However, he successfully made it to the provinces of Kai and Kōzuke, where the

Takeda is a Japanese name, Japanese family name.1990 Census Name Files