焼畑村落の展開過程に関する歴史地理学的研究 : 飛騨白川郷を例として

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The purpose of this article is to document the changing process of the yakihata (shifting cultivation) villages from the early Edo Period to the present. The study area, Shirakawa-Go, is located in the northwest of Gifu Prefecture. There were 23 villages in Shirakawa-Go and all of them included many yakihata fields. The author discovered and studied some historical documents concerning yakihata in the Shirakawa village office. They are Genroku (1694) and An-ei (1774) Era kenchi-cho (cadasters in Edo Era), Kyoho (1720s) and Tempo (1830s) Era mountain drawings and Meiji Era cadasters (1888). The author examined the distribution of yakihata in every koaza (sub-division of village) from the Genroku Era onward, and the form and location of each unit of yakihata fields in the late Meiji Era when the greatest expansion of yakihata occurred. Also investigated were the historical changes of landownership of yakihata. The main results are summarized as follows:It has been believed in previous studies that yakihata had decreased with the passage of time. But the present study shows the opposite. That is to say, yakihata had rather increased from the early Edo Period to the late Meiji Era. Only after the late Meiji Era did they begin to decrease, becoming extinct in a fairly short time.The main location of yakihata moved from around the residential sections to land farther away, and also from gentle slopes to steeper slopes. As for the changing process of the agricultural land use, it has been hypothesized that the general tendency is that yakihata were transformed to paddy field. However, this tendency was not proven clearly in this study. Almost all the yakihata fields had turned into forest or wasteland, not to paddy fields.There were 630 units of yakihata fields in Shirakawa-Go in the late Meiji Era. The mean area of a unit was about 1ha. The typical yakihata fields were cleared at 700-1, 000m elevation, within a distance of 1-2km from the farmers houses, and on the easterly slopes of the mountains with a gradient of 20-30 degrees.Next, in relation to the changes in landownership, the following findings were made: In the Genroku Era, some villages consisted only of honbyakusho (independent farmers), and others of honbyakusho and kakae (subordinate farmers). There was not a great difference in the landholdings among honbyakusho in each village. On the other hand, kakae owned less land than honbyakusho. However, during the latter half of Edo Period, both types of farmers were engaged in developing new land, especially of new yakihata fields. So, by the An-ei Era, the kakae came to own a considrable area of land and became independent of the honbyakusho. And at about the same time, many village-owned yakihata fields were cleared, and in these common yakihata fields, any farmer in the village was entitled to utilization at any time for their own profit. So we could not End the typical differentiation of social strata among farmers in the study area.Shirakawa-Go was characterized by its low agriculutural productivity in the Edo Period and Meiji Era. However, the population there grew during the same period of time. It can thus be inferred that the large area of yakihata fields cultivated in those days played an important role in supporting the growth of population.

焼畑村落の展開過程に関する歴史地理学的研究 : 飛騨白川郷を例として

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