院政期知行国制度の基礎的研究 : 知行国の変遷と分布

抄録

If one were to analyze the previous research work done on provinces held in fief (chigyokoku 知行国), one could divide this work into studies on the changes which took place in that system over time and studies of the system's structural characteristics. As opposed to the former's tendency to limit itself merely to provinces held in fief by the Taira Family (Heishi 平氏), in this essay the author attempts to trace the development of provincial fiefdoms in general over the whole period of the retired emperor's house rule (Insei-ki 院政期) from 1086 to 1179. In concrete terms, the author will trace the changes which occurred in the provincial fiefdoms held not only by the Taira but also by the female members of the retired emperor's family (Nyoin 女院), house advisors (In-no-kin-shin 院近臣) and the Fujiwara Regents (Sekkanke 摂関家), and investigate the changes in relation to the political process of the time. In his investigations the author was able to discover some previously unnoticed historical materials which helped him to make the following points : 1)Provinces held in fief were established into a system in the form of allotments to house advisors ; however, this stage was only achieved after the 2nd year of the Kajo 嘉承 era (1107), when the house government of the ex-emperor Shirakawa 白河 got under way in earnest. 2)Provincial fiefdoms formed the material base of the lord/vassal relationship between the ex-emperor and fiefdom holders ; and the appointed numder of these fiefdoms was the numerical expression of the degree of intimacy between the two parties. And for that reason, all fiefdom holders went out in many ways to both maintain and increase their appaointed number. 3)The Taira Family, through the risings of the Hogen 保元 and Heiji 平治 eras (1156 and 1159), succeeded in expropriating the provincial fiefdoms held by house advisors and the Fujiwara Regents, and built the Taira hegemony upon them which lasted until 1185. 4)The fact that the infeudation of the top administrative office for Kyushu, Dazaifu 太宰府, was urged by both the Taira and the Fujiwara Regents, proves that the provincial fiefdom system also spread to various offices within the imperial court.