Aiba River

…In 1694 (Genroku 7), the number of towns was 41 in the castle town of Hagi and 13 in Hamasaki (Genroku Gokoku Metsukeki), but in 1716 (Kyoho 1), the number of towns increased to 58 in total in the castle town (Junken Gometsukeshu), and remained unchanged until the end of the Edo period. Because of frequent floods, the Shinbori River was excavated in the center in 1687 (Jokyo 4), the Aiba River in 1739 (Genbun 4), and the Ubakura Canal was opened downstream of the Matsumoto River in 1855 (Ansei 2) to drain the water and use it for irrigation and shipping. In 1863 (Bunkyu 3), the feudal government office was moved to Yamaguchi, and Hagi lost its function as a castle town, which also caused a major economic blow. …

*Some of the terminology that refers to the "Aibagawa River" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…町数は1694年(元禄7)に萩城下本町41，浜崎13であったが(《元禄御国目付記》)，1716年(享保1)城下本町で増加して合計58町となり(《巡見御目付集》)，以後幕末まで変動はなかった。たびたび洪水に見舞われたため，中央部に1687年(貞享4)新堀川，1739年(元文4)藍場川を開削し，松本川下流に1855年(安政2)姥倉運河を開通させて排水を行い，灌漑や舟運に利用した。1863年(文久3)藩庁が山口に移転したため，萩は城下町の機能を失い，経済的にも大きな打撃を受けた。…

※「藍場川」について言及している用語解説の一部を掲載しています。

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