Analysis of "Kawamawasi Sinden" by the landforms and classic documents. The Local type of ricefield of Edo Era in Boso Hills, Chiba Prefecture, Japan.

Kawamawasi Sinden是日本千叶县博索山的当地稻田类型。江户时代的博索山农在废弃的河床上修筑狭窄的稻田，用海峡运河或隧道切断蜿蜒的峡谷，通过调查发现和统计了“川马西沟”的位置和类型。门店的数量是450家。“卡瓦瓦西·辛登”分为五种类型，“卡瓦瓦西·辛登”的建造成本和建造时间都是根据经典文献估算的。

"Kawamawasi Sinden" is the local type of the ricefield in Boso Hills, Chiba Prefecture, Japan. The farmers in Boso Hills in Edo Era cut off incised meandering valleys by strait canals or tunnels and build narrow ricefield on the abandoned river floor.By this investigation the locations and types of "Kawamawasi Sinden" are discovered and counted. The number of the locations is 450. "Kawamawasi Sinden" is classified to five types.The cost and the days of the building "Kawamawasi Sinden" are estimated by the classic documents.