Tomomasa Hiraga

A military commander in the early Kamakura period. His name is also written as Asamasa. His father was Musashinokami Yoshinobu. His mother was the third daughter of Hiki no Ama, the wet nurse of Minamoto no Yoritomo. He was Yoritomo's adopted son. He was the son-in-law of Hojo Tokimasa's second wife, Maki no Kata. He served as Musashinokami and Uemon no Gonnosuke. In September 1203 (Kennin 3), he participated in the pursuit of Hiki Yoshikazu, and in October, he was appointed as the Kyoto Shugo and went to Kyoto. The following year, when the remnants of the Taira clan in Iga and Ise started a rebellion, he put down the rebellion, and in May, as a reward for his achievements, he was appointed as the Shugo of both provinces. In November of that year, he had an argument with Hatakeyama Shigeyasu, who was in Kyoto, and slandered Shigeyasu to his mother-in-law, Makikata. As a result, in June 1205 (Genkyu 2), the Hatakeyama clan was wiped out by order of Hojo Tokimasa. However, a rift developed between Tokimasa and his sons Masako and Yoshitoki over how to handle this incident, and when Makikata discovered a plot to support Tomomasa as shogun in leap July of the same year, Tokimasa and Makikata were imprisoned in Izu by Masako and Yoshitoki, and Tomomasa was executed in Kyoto on the 26th of the same month.

[Shinichi Kikuchi]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

鎌倉前期の武将。朝政とも書く。父は武蔵守(むさしのかみ)義信(よしのぶ)。母は源頼朝(よりとも)の乳母(めのと)比企尼(ひきのあま)の三女。頼朝の猶子(ゆうし)。北条時政(ときまさ)の後妻牧方(まきのかた)の女婿(じょせい)。武蔵守、右衛門権佐(うえもんのごんのすけ)を歴任。1203年（建仁3）9月、比企能員(よしかず)追討に加わり、10月、京都守護に任じられ上洛(じょうらく)する。翌年伊賀(いが)・伊勢(いせ)の平氏残党が反乱を起こした際これを平定し、5月には勲功賞として両国の守護職に補任(ぶにん)された。この年11月に在京中の畠山重保(はたけやましげやす)と口論し、重保を義母牧方に讒言(ざんげん)。これが原因となって、1205年（元久2）6月に畠山一族は北条時政の命により滅ぼされた。しかしこの事件の処理をめぐって、時政とその子政子(まさこ)・義時(よしとき)の間に隔絶が生じ、同年閏(うるう)7月牧方が朝雅を将軍に擁立しようとする陰謀が発覚するに及び、時政・牧方は政子・義時によって伊豆に幽閉され、朝雅も同月26日に京都で誅(ちゅう)された。

［菊池紳一］

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