Kodera ruins

Japanese: 古照遺跡 - こでらいせき

This is a dam ruin from the Kofun period (4th to 5th centuries) located in the western suburbs of Matsuyama City, Ehime Prefecture. Discovered in 1972 during construction work for a sewage treatment plant, it was initially mistaken for a buried house, but excavation revealed that it was the remains of three dams measuring 13m, 24m, and 8m in width to secure water for irrigation. The dam consisted of a row of piles driven perpendicular to the flow of water, a log about 15cm in diameter placed horizontally on the upstream side, and a piece of wood several centimeters in diameter placed in a gabled shape in the direction of the flow of water. An intake for irrigation water was provided upstream of that. Using some construction waste, the Kofun period architecture is now being restored.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

愛媛県松山市西郊にある古墳時代(4～5世紀)の堰堤遺跡。1972年，下水処理場建設工事で発見，当初埋没家屋と誤認されたが，発掘の結果，幅13m，24m，8mの3ヵ所の用水確保のための堰の遺構であることがわかった。堰は流れに直交する方向に杭列を打ち，その上流側に径15cmほどの丸太を横に渡し，これに合掌状に径数cmの材を流路方向にかぶせた堰堤で，その上流側に用水の取入口が設けられていた。一部建築廃材を使用し，これから古墳時代建築の復原もなされている。

出典　株式会社平凡社世界大百科事典第２版について　情報

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