Kudzuno Dam - Corner Canal

Japanese: 葛野大堰 - かどのおおい

…In addition, the San'in Road, Shuzan Kaido, and Wakasa Kaido roads ran along the river valleys, connecting the coastal areas of the Sea of Japan with Kyoto, and castle towns developed in Kameoka (Kameyama) and Sonobe. [Hattori Masayuki]
[history]
According to the Hata Clan Hon Keicho, which is thought to record the genealogy of the Hata clan, the Hata clan as a whole built a water intake dam on the Kadono River, and called it Kadono Ozeki. As a result, the Hata clan succeeded in developing the river basin in the second half of the 5th century, and the dam became a monumental facility, and the river came to be called Ozekigawa.

From [Kuzuno River]

...The river basin was developed early on, and there are many ruins from the Yayoi period and other times. It appears in literature early on, and in the latter half of the 5th century, a water intake dam called the Kazuno Ozeki was built. As Katsura-tsu developed during the Heian period, the name Katsura River became common, and the name Kazuno River was rarely used. ...

*Some of the terminology used in reference to "Kudano Oseki" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また河谷沿いに陸路も山陰道，周山街道，若狭街道があって，日本海沿岸地域と京都を連絡し，亀岡(亀山)，園部には城下町が発達した。【服部昌之】
［歴史］
　名称の大堰は，秦氏の系譜を記したと思われる〈秦氏本系帳〉によれば，秦氏が一族をあげて葛野（かどの）川に取水堰を築いたといい，〈葛野大堰〉と呼んだ。これによって秦氏は5世紀後半に流域の開発に成功し，そのために大堰は記念すべき施設となり，川の名称も大堰川と呼ばれるようになった。…