Onnabori - Onnabori

Japanese: 女堀 - おんなぼり

<br /> The remains of an agricultural canal stretching from Kamiizumi-cho, Maebashi City, Gunma Prefecture to Kokusada-cho, Isesaki City. It was excavated along the 100m contour line at the southern foot of Mount Akagi, taking water from Furutone (Momonoki River) in Kamiizumi-cho, Akagi City, and running 12.75km to Nishi-Kokusada, Higashi Village, Sawa County. It is believed to have been excavated by the Fuchina clan, who ruled the area at the time, to redevelop the rice fields at the end of the Omama alluvial fan, which suffered devastating damage from the eruption of Mount Asama in 1108 ( Tennin 1). It was a large-scale agricultural canal, and is a valuable monument that tells of the development of rice fields that was promoted with a large amount of manpower. It was designated a national historic site in 1983 (Showa 58), and was further designated in 1997 (Heisei 9) because it is a valuable monument that tells of the development of rice fields that was promoted with a large amount of manpower, because it remains in its original form, and because important remains were confirmed during investigations. In order to preserve the existing remains and the raised areas, the land was made public, and 24,000 irises were planted and the Akabori Iris Garden was opened. From JR Ryomo Line Maebashi Station, take the Nagai Transportation Bus to "Ninomiya Jinja Ura" and walk for about 5 minutes.

Source: Kodansha National Historic Site Guide Information

Japanese:

群馬県前橋市上泉町から伊勢崎市国定町まで続く農業用水跡。赤城山南麓の標高100mの等高線に沿って開削(かいさく)されたもので、同市上泉町の古利根（桃木川）から取水し、旧佐波郡東村西国定にいたる12.75kmの農業用水跡で、1108年（天仁1）の浅間山の爆発により、壊滅的な被害を受けた大間々(おおまま)扇状地末端地域の水田再開発のため、当時この地域を支配していた渕名氏が開削したと推測される。大規模な農業用水であり、大量の人力を投入して水田開発を推進したことを物語る記念物として貴重なことや、原形がそのまま残っており、調査からも重要な遺構が確認されたため、1983年（昭和58）に国の史跡に指定され、1997年（平成9）に追加指定された。現存している遺構や土上げ部分の保全のために公有地化され、2万4000株の花菖蒲を植えて赤堀花しょうぶ園が開園した。JR両毛線前橋駅から永井運輸バス「二之宮神社裏」下車、徒歩約5分。

出典　講談社国指定史跡ガイドについて　情報

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