The interdisciplinary study about Toas-chijo farnily from a viewpoint of marine transportation and the circulation

一条家是土佐国羽田庄园的领主。我们考察了一条家族贸易活动的实际情况，并阐明了羽田庄园的历史作用。作为基础工作，我进行了对神龟家族（神龟家族是一条家族的亲戚）的遗址的挖掘。结果，我们发现了建筑物的基石和许多遗迹，并确认这是哈达庄园的代表之地。此外，神组家族的西多直接与港口和港口城市相连。一条家族广泛地组织了海上诸侯，并参与了区域贸易活动。一条家族真的有建造Karabune的事实（有意识的航行到中国的大船）。在羽田地区出土的大量陶瓷很可能是一条家族的贸易活动带来的。一条家族与大内家族、大友家族和伊藤家族缔结了婚姻关系，并确保了从濑户内海通往丰后海峡的海上通道。此外，一条家族与本愿寺和酒井商人结盟。一条家族由此确保了从北丹海峡到达土佐近海的路线。这两条路线在海田近海汇合。哈达庄园在海上交通中占有重要地位。这也是一条家重视羽田庄园的目的。

Ichijou family was a manor feudal lord of Hata manor in the Country of Tosa. We are investigate the actual situation of the trade activity of Ichijou family, and clarify the historic role of the Hata manor. As the basic work, I performed the excavation of the sito of kagumi family premises (kagumi family was the relative of Ichijou family). As a result, we detected cornerstones of the building and many remains, and confirmed that it was the representative place of the Hata manor. In addition, the sito of kagumi family premises was connected directly with a harbor and the port city. It was a stronghold of the feudal lord of the seas definitely.Ichijou family organized the feudal lords of the seas widely and participated in regional trade activity. Ichijou family really has the fact that constructed Karabune (The big ship which was conscious of a voyage to China). It is very likely that a lot of ceramics excavated in Hata area were brought by trade activity of Ichijou family.Ichijou family concluded marital status with Ouuchi family, Outomo family and Ito family, and secured the way of the sea which led to Bungo Chnnel from the Seto Inland Sea. Furthermore, Ichijou family was allied with Honganji temple and the merchant of Sakai. Ichijou family secured the route which reached in the Tosa offing from Kitan Strait thereby. These two routes join in the Hata offing. Hata manor occupied the important position in the marine transportation. It was the purpose that Ichijou family thought much of Hata manor.