Asuda River - Asuda River

…It forms the border between the Sumida and Koto wards on the east side and the Taito and Chuo wards on the west side, and was the border between Musashi and Shimousa until the early modern period. In the past, it was written as Sumida River, Tsunoda River, and Sumida River, and was also called Suda River, Asuda River, Someda River, Asakusa River, and Miyato River. In the early modern period, the river downstream from the current Azuma Bridge was affectionately known as Okawa River. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…東側の墨田･江東両区と西側の台東･中央両区の境界をなし，近世初頭までは武蔵と下総の国境となっていた。古くは住田川，角田川，墨田川とも書き，須田（すだ）川，あすだ川，染田川，浅草川，宮戸(都)川とも呼ばれた。近世，今の吾妻（あづま）橋から下流は大川の名で親しまれた。…

※「あすだ川」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