Imazugawa

…It is also called the Iwakuni River. It originates from Mt. Azamigatake (1,004m) on the border with Shimane Prefecture in the northwest of Tsuno District, Yamaguchi Prefecture, and the Kano Basin opens up in the upper reaches, but it is very winding, and most of the middle reaches in the northern part of Tokuyama City, Nishiki Town, and Mikawa Town form gorges. In Iwakuni City, it branches into the Imazu River and Monzen River, creating a delta plain before flowing into Hiroshima Bay. Its river length is about 110 km, and its drainage area, including its tributaries the Usa River, Hongo River, and Ikimi River, is 884 km2. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…岩国川ともいう。山口県都濃（つの）郡北西部，島根県境にある莇ヶ岳（あざみがたけ）(1004m)に発し，上流には鹿野（かの）盆地がひらけるが，屈曲が激しく，中流以下の徳山市北部，錦町，美川町では大部分が峡谷をなし，岩国市で今津川，門前川に分流，三角州平野をつくって広島湾に流入する。流路延長約110km，支流の宇佐川，本郷川，生見（いきみ）川などを含めて流域面積は884km2。…

※「今津川」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