Taira no Sadamori - Taira no Sadamori

Date of birth and death unknown. Military commander in the mid-Heian period. Son of Taira Kunika. At the time Taira Masakado raised his army, he was a Kyoto official (Sama no Jo) (Shomonki), but he held a wide variety of government positions throughout his life. After his father Kunika died, he was forced to fight against Masakado as the head of the Taira clan, but he took a passive stance. However, in 940 (Tenkei 3), he defeated Masakado together with Fujiwara Hidesato, the governor of Shimotsuke Province, and was awarded the rank of Umanosuke, Junior Fifth Rank, for his achievements. He is also said to have served as Chinjufu Shogun and Mutsu no Kami. Sadamori's career is also found in the Konjaku Monogatari, and the picture is by no means limited to the framework of the Shomonki. Among his sons, Koremasa's lineage became the Hojo clan, and Korehira's lineage became the Ise Heishi clan, so Sadamori's wide-ranging actions can be reevaluated. Furthermore, the legend that his nephew Koremoto succeeded him as the head of the Hitachi Heishi clan is not unrelated to Sadamori's career.

[Itoga Shigeo]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

生没年不詳。平安中期の武将。平国香(くにか)の子。平将門(まさかど)挙兵当時は京官(きょうかん)（左馬允(さまのじょう)）であったという（将門記(しょうもんき)）が、生涯の任官歴は多彩である。父国香死去後、平氏棟梁(とうりょう)として将門との対戦を余儀なくされるが、その態度は消極的であった。しかし、940年（天慶3）に至り、下野(しもつけ)国押領使(おうりょうし)藤原秀郷(ひでさと)とともに将門を討ち、その功により正五位上右馬介(うまのすけ)に叙せられた。また、鎮守府将軍、陸奥守(むつのかみ)などを歴任したともいう。貞盛の経歴は『今昔(こんじゃく)物語』にもみえ、その映像はけっして『将門記』の枠内にとどまらない。子息らのうち、維将(これまさ)流が北条氏、維衡(これひら)流が伊勢(いせ)平氏として展開を遂げていることからも、貞盛の広範な行動が再評価されてよい。さらに、甥(おい)維幹(これもと)が常陸(ひたち)平氏本宗(ほんそう)を継いだ所伝も、貞盛のかかる履歴と無関係ではない。

［糸賀茂男］

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