Minamoto clan (源 Minamoto-shi ) was one of the surnames bestowed by the Emperors of Japan upon members of the imperial family who were demoted into the ranks of the nobility. The practice was most prevalent during the Heian Period (794–1185 AD), although its last occurrence was during the Sengoku Era. The Taira were another such offshoot of the imperial dynasty. The Minamoto clan is also called the Genji (源氏), using the Sino–Japanese pronunciation of the Chinese characters for Minamoto (gen) and family (ji).
The first emperor to grant the surname Minamoto was Emperor Saga, who reportedly had 49 children, resulting in a significant financial burden on the imperial household. In order to alleviate some of the pressure of supporting his unusually large family, he made many of his sons and daughters nobles instead of royals. He chose the word minamoto (meaning "origin") for their new surname in order to signify that the new clan shared the same origins as the royal family. Afterwards, Emperor Seiwa, Emperor Murakami, Emperor Uda, and Emperor Daigo, among others, also gave their sons or daughters the name Minamoto. These specific hereditary lines coming from different emperors developed into specific clans referred to by the emperor's name followed by Genji, e.g. Seiwa Genji. According to some sources, the first to be given the name Minamoto was Minamoto no Makoto, seventh son of Emperor Saga.
In 814, Emperor Saga (reigned 809–823) awarded the kabane Minamoto no Ason to his non-heir sons; thereafter, they and their descendants ceased to be members of the Imperial Family. Several subsequent emperors gave the Minamoto surname to their non-heir sons.
The most prominent of the several Minamoto families, the Seiwa Genji, descended from Minamoto no Tsunemoto (917–961), a grandson of the 56th Emperor Seiwa. Tsunemoto went to the provinces and became the founder of a major warrior dynasty. Minamoto no Mitsunaka (912–997) formed an alliance with the Fujiwara. Thereafter the Fujiwara frequently called upon the Minamoto to restore order in the capital, Heian-Kyo (or Kyoto.)
Mitsunaka's eldest son, Minamoto no Yorimitsu (948–1021), became the protégé of Fujiwara no Michinaga; another son, Minamoto no Yorinobu (968–1048) suppressed the rebellion of Taira no Tadatsune in 1032. Yorinobu's son, Minamoto no Yoriyoshi (998–1075), and grandson, Minamoto no Yoshiie (1039–1106), pacified most of northeastern Japan between 1051 and 1087.
The Seiwa Genji's fortunes declined in the Hōgen Rebellion (1156), when the Taira executed much of the line. During the Heiji Disturbance (1160), the head of the Seiwa Genji clan, Minamoto no Yoshitomo, died in battle. Taira no Kiyomori seized power in Kyoto by forging an alliance with the retired emperors Shirakawa and Toba and infiltrating the kuge. He sent Minamoto no Yoritomo (1147–1199), the third son of Minamoto no Yoshimoto of the Seiwa Genji, into exile. In 1180 Yoritomo mounted a full-scale rebellion against the Taira rule (the Genpei or the Taira-Minamoto War), culminating in the destruction of the Taira and the subjugation of eastern Japan within five years. In 1192 he received the title shogun and set up the first bakufu at Kamakura.
Thus the Seiwa Genji line proved to be the most strong and dominant Minamoto line during the late Heian period with Minamoto no Yoritomo eventually forming the Kamakura Shogunate and becoming shogun in 1192. Also, it's from the Seiwa Genji line that the later Ashikaga (founders of the Ashikaga shogunate), Nitta, and Takeda clans come.
The protagonist of the classical Japanese novel The Tale of Genji, Hikaru no Genji, was bestowed the name Minamoto for political reasons by his father the emperor and was delegated to civilian life and a career as an imperial officer.
Members of the Minamoto clan
Even within royalty there was a distinction between princes with the title shinnō (親王?) ("[having the] ability to advance," i.e., eligible to become the new Emperor), who could ascend to the throne, and princes with the title ō (王?) ("great" or "major"), who were not members of the line of imperial succession but nevertheless remained members of the royal class (and therefore outranked members of Minamoto clans). The bestowing of the Minamoto name on a (theretofore-)prince or his descendants excluded them from the royal class altogether, thereby operating as a reduction in legal and social rank even for ō-princes not previously in the line of succession.
Many later clans were formed by members of the Minamoto clan, and in many early cases, progenitors of these clans are known by either family name. There are also known monks of Minamoto descent; these are often noted in genealogies but did not carry the clan name (in favor of a dharma name).
There were 21 branches of the clan, each named after the emperor from whom it descended. Some of these lineages were populous, but a few produced no descendants.
The Saga Genji were descendants of Emperor Saga. As the Emperor had many children, many were bestowed the uji Minamoto, declassing them from imperial succession. Among his sons, Makoto, Tokiwa, and Tōru became sadaijin; they were among the most powerful in the Imperial Court in the early Heian period. Some of Tōru's descendants in particular settled the provinces and formed buke. Clans such as the Watanabe, Matsura, and Kamachi descended from the Saga Genji.
Noted Saga Genji and descendants include:
- Makoto, seventh son of the Emperor
- Hiromu, eighth son of the Emperor
- Hitoshi, grandson of Hiromu
- Tokiwa, son of the Emperor
- Okoru, first son of Tokiwa
- Sadamu, son of the Emperor
- Shitagō, great-grandson of Sadamu
- Hiroshi, son of the Emperor
- Tōru, son of the Emperor
- Tsutomu, son of the Emperor
- Hiraku, son of the Emperor
History records that at least three of Emperor Saga's daughters were also made Minamoto (Kiyohime, Sadahime, and Yoshihime), but few records concerning his daughters are known.
These were descendants of Emperor Ninmyō. His sons Masaru and Hikaru were udaijin. Among Hikaru's descendants was Minamoto no Atsushi, adoptive father of the Saga Genji's Tsuna and father of the Seiwa Genji's Mitsunaka's wife.
These were descendants of Emperor Seiwa. The most numerous of them were those descended from Tsunemoto, son of Prince Sadazumi. Hachimantarō Yoshiie of the Kawachi Genji was a leader of a buke. His descendants set up the Kamakura shogunate, making his a prestigious pedigree claimed by many buke, particularly for the direct descendants in the Ashikaga clan (that set up the Ashikaga shogunate) and the rival Nitta clan. Centuries later, Tokugawa Ieyasu would claim descent from the Seiwa Genji by way of the Nitta clan.
These were descendants of Emperor Yōzei. While Tsunemoto is termed the ancestor of the Seiwa Genji, there is evidence (rediscovered in the late 19th century by Hoshino Hisashi) suggesting that he was actually the grandson of Yōzei rather than of Seiwa. This theory is not widely accepted as fact, but as Yōzei was deposed for reprehensible behavior, there would have been a compelling motive to claim descent from more auspicious origins if it were the case.
These were descendants of Emperor Kōkō. The great-grandson of his firstborn Prince Koretada, Kōshō, was the ancestor of a line of busshi, from which various styles of Buddhist sculpture emerged. Kōshō's grandson Kakujo established the Shichijō Bussho workshop.
These were descendants of Emperor Uda. Two sons of Prince Atsumi, Masanobu and Shigenobu became sadaijin. Masanobu's children in particular flourished, forming five dōjō houses as kuge, and as buke the Sasaki clan of the Ōmi Genji, and the Izumo Genji.
These were descendants of Emperor Daigo. His son Takaakira became a sadaijin, but his downfall came during the Anna incident. Takaakira's descendants include the Okamoto and Kawajiri clans. Daigo's grandson Hiromasa was a reputed musician.
These were descendants of Emperor Murakami. His grandson Morofusa was an udaijin and had many descendants, among them several houses of dōjō kuge. Until the Ashikaga clan took it during the Muromachi period, the title of Genji no Chōja always fell to one of Morofusa's progeny.
These were descendants of Emperor Reizei. Though they are included among the listing of 21 Genji lineages, no concrete record of the names of his descendants made Minamoto is known to survive.
These were descendants of Emperor Sanjō's son Prince Atsuakira. Starting with one of them, Michisue, the position of Ōkimi-no-kami (chief genealogist of the imperial family) in the Ministry of the Imperial Household was passed down hereditarily.
These were descendants of Emperor Go-Sanjō's son Prince Sukehito. Sukehito's son Arihito was a sadaijin'. Minamoto no Yoritomo's vassal Tashiro Nobutsuna, who appears in the Tale of the Heike, was allegedly Arihito's grandson (according to the Genpei Jōsuiki).
This line consisted solely of Emperor Go-Shirakawa son Mochihito-ō (Takakura-no-Miya). As part of the succession dispute that led to the opening hostilities of the Genpei War, he was declassed (renamed "Minamoto no Mochimitsu") and exiled.
This line consisted solely of Emperor Go-Saga's grandson Prince Koreyasu. Koreyasu-ō was installed as a puppet shogun (the seventh of the Kamakura shogunate) at a young age, and was renamed "Minamoto no Koreyasu" a few years later. After he was deposed, he regained royal status, and became a monk soon after, thereby losing the Minamoto name.
These were descendants of Emperor Go-Fusakusa's son Prince Hisaaki (the eighth shogun of the Kamakura shogunate). Hisaaki's sons Prince Morikuni (the next shogun) and Prince Hisayoshi were made Minamoto. Hisayoshi's adopted "nephew" (actually Nijō Michihira's son) Muneaki became a gon-dainagon (acting dainagon).
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- Frederic, Louis (2002). Japan Encyclopedia. Cambridge, Massachusetts: Harvard University Press.
- Sansom, George (1958). 'A History of Japan to 1334'. Stanford, California: Stanford University Press.*