The Taira Tadatsune Rebellion

A rebellion in the mid-Heian period. It began in 1028 (Chogen 1) when Shimousa Gonnosuke Taira Tadatsune burned Awa no Kami Koretada to death and occupied Kazusa Kokufu. The Imperial Court tried to suppress the rebellion by appointing Taira Naokata as the punitive emissary, Kazusa no Kami Koretoki as Kazusa no Kami, Masasuke as Awa no Kami, and mainly the Sadamori lineage Taira clan, but failed. They then appointed Minamoto no Yorinobu as the punitive emissary, and finally pacified the rebellion in 1031. Tadatsune died during his capture in Kyoto, and his descendants were pardoned. After more than three years of pursuit, the three provinces of Boso were destroyed and the entire southern Kanto region was devastated, but during the restoration, a new feudal system developed and many samurai groups were born. In that sense, this rebellion, as a Kanto rebellion that surpassed the Taira no Masakado Rebellion in the 10th century, brought to light the collapse of the Ritsuryo local administrative system, and is regarded as an event that prompted the transition to a dynastic state system. This rebellion also marked the opportunity for the descendants of Minamoto no Yorinobu, who put down the rebellion, to rule the eastern provinces as the heads of the samurai, and Tadatsune's descendants also participated in the fighting following the Battle of Zenkunen (the Battle of Zenkunen) following Yorinobu's descendants.

[Toyohiko Fukuda]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

平安中期の反乱事件。1028年（長元1）、下総権介(しもうさのごんのすけ)平忠常が安房守惟忠(あわのかみこれただ)を焼き殺し、上総(かずさ)国府を占拠したことに始まる。朝廷では追討使に平直方(なおかた)、上総介に維時(これとき)、安房守に正輔(まさすけ)と、貞盛(さだもり)流平氏を中心に配置して鎮圧しようとしたが成功せず、改めて源頼信(よりのぶ)を追討使に登用し、31年にようやく平定した。忠常は京都への連行途中に死去し、子孫は宥免(ゆうめん)された。3年余にわたる追討により房総三国は亡国化し、南関東一帯が荒廃したが、その復興のなかで新しい領主制が展開し、多くの武士団が生まれる。その意味でこの反乱は、10世紀の平将門(まさかど)の乱を超える関東の反乱として、律令(りつりょう)的地方行政制度の破綻(はたん)を表面化したものであり、王朝国家体制への国制転換を促した事件として評価されている。この乱はまた、乱平定者源頼信の子孫が武士の棟梁(とうりょう)として東国に君臨する契機となった事件で、忠常の子孫も前九年の合戦以降の戦闘に頼信の子孫に従って参加する。

［福田豊彦］

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